Squash Gratin with Mornay Sauce

This Squash Gratin with Mornay Sauce combines the rich flavors of sautéed squash and zucchini with a creamy Gruyère-based Mornay sauce. The golden, bubbly top adds a satisfying crunch, while the inside remains tender and flavorful. It’s a perfect side dish for cool fall evenings, adding both comfort and elegance to your dinner table.

Whether you’re hosting a holiday feast or simply enjoying a cozy meal at home, this gratin brings out the best in seasonal vegetables. The combination of the savory sauce and the crisp breadcrumb topping will leave your guests asking for seconds. It’s easy to prepare and guaranteed to impress.

Full Recipe:

  • 2 tablespoons butter
  • 1 tablespoon olive oil
  • 2 medium yellow squash, sliced
  • 1 medium zucchini, sliced
  • 1 cup grated Gruyère cheese
  • 1/4 cup all-purpose flour
  • 1 1/2 cups whole milk
  • Salt and pepper to taste
  • 1/4 cup breadcrumbs
  • 2 tablespoons chopped parsley

Directions:

  1. Preheat the oven to 375°F (190°C).
  2. In a skillet, melt the butter with olive oil over medium heat.
  3. Sauté the sliced squash and zucchini until they are tender, about 5-7 minutes.
  4. In a separate saucepan, whisk together the flour and milk over medium heat to create a béchamel sauce.
  5. Gradually stir in the Gruyère cheese until melted and smooth, creating a Mornay sauce.
  6. Layer the sautéed squash and zucchini in a greased baking dish.
  7. Pour the Mornay sauce over the vegetables, spreading it evenly.
  8. Sprinkle the breadcrumbs and chopped parsley over the top.
  9. Bake for 20-25 minutes or until the top is golden brown and bubbly.

Prep Time: 10 minutes | Cooking Time: 35 minutes | Total Time: 45 minutes

Kcal: 280 kcal | Servings: 4 servings

Squash Gratin with Mornay Sauce: A Comforting Classic with a Gourmet Twist

When it comes to comfort food, few dishes offer the same level of satisfaction as a gratin. Whether it’s the golden, cheesy topping or the creamy, tender vegetables underneath, a gratin has the power to elevate a humble meal into something truly special. The Squash Gratin with Mornay Sauce is a prime example of this culinary magic. With its rich and velvety Mornay sauce (a béchamel enriched with Gruyère cheese) and layers of sautéed yellow squash and zucchini, this dish strikes the perfect balance between rustic comfort and gourmet indulgence.

The Allure of the Gratin

Gratin dishes are beloved across various cuisines, from French classics to more contemporary takes on baked vegetable casseroles. The word “gratin” itself originates from the French term “gratter,” meaning to scrape, which refers to the crispy, browned crust that forms on top of these dishes. Typically, a gratin is prepared with a topping of cheese, breadcrumbs, or both, and baked in the oven until golden and bubbling.

The charm of a gratin lies in its simplicity and versatility. Whether made with vegetables, potatoes, or pasta, a gratin can take on various flavor profiles, depending on the ingredients and seasoning. In the case of this Squash Gratin with Mornay Sauce, the use of yellow squash and zucchini provides a light, fresh base, while the rich, cheesy sauce adds depth and warmth.

Why Squash and Zucchini?

Squash and zucchini are staples of the summer harvest, but their mild flavor and adaptable texture make them ideal for cooking year-round. Both vegetables belong to the gourd family and are known for their high water content, subtle sweetness, and versatility in the kitchen. In this gratin, their gentle flavor acts as a canvas for the luxurious Mornay sauce, allowing the cheese and sauce to take center stage without being overpowering.

Key Benefits of Squash and Zucchini:

  • Rich in Nutrients: Both vegetables are excellent sources of vitamins A, C, and K, which support eye health, skin vitality, and bone strength.
  • Low in Calories: With minimal calories per serving, squash and zucchini are perfect for those looking to maintain a balanced diet while still indulging in a flavorful dish.
  • Hydration and Digestion: Thanks to their high water content, these vegetables aid in hydration and promote healthy digestion.
  • Anti-inflammatory Properties: Squash contains antioxidants like carotenoids that may help reduce inflammation and support overall well-being.

The Magic of Mornay Sauce

The Mornay sauce is what truly sets this gratin apart from other vegetable bakes. A Mornay is essentially a béchamel sauce (one of the five “mother sauces” of French cuisine) that has been enriched with cheese. In this recipe, the cheese of choice is Gruyère, a Swiss cheese known for its creamy texture and slightly nutty flavor.

Why Gruyère?

  • Creaminess: Gruyère melts beautifully, creating a smooth and velvety texture that perfectly complements the tender squash.
  • Flavor: Its mild, nutty taste is subtle enough to enhance the vegetables without overwhelming them, yet it still provides a distinctive savory note.
  • Crust Formation: Gruyère is also known for creating an irresistible golden-brown crust when baked, making it ideal for gratins and other cheesy bakes.

If Gruyère is unavailable or you prefer a different cheese, you can substitute it with other good melting cheeses such as Emmental, Comté, or even a mild cheddar. However, Gruyère’s unique qualities make it the best option for achieving the perfect balance of flavor and texture in this dish.

The Role of Breadcrumbs

A key component of any good gratin is the breadcrumb topping, which provides a crispy contrast to the soft vegetables and creamy sauce below. In this Squash Gratin with Mornay Sauce, the breadcrumbs are lightly seasoned and toasted, adding texture and a slight crunch to every bite.

Benefits of Using Breadcrumbs:

  • Texture: The breadcrumbs add a satisfying crunch to the otherwise creamy dish, making each bite more dynamic.
  • Flavor Absorption: The breadcrumbs absorb some of the flavors from the sauce and herbs, intensifying the overall taste experience.
  • Golden Finish: As the gratin bakes, the breadcrumbs turn a beautiful golden brown, adding visual appeal and a sense of rustic elegance to the dish.

Customizing the Dish

One of the best aspects of this recipe is its versatility. While the combination of squash, zucchini, and Mornay sauce is delicious on its own, there are plenty of ways to customize the dish to suit your preferences or dietary needs. Here are a few ideas to make this gratin your own:

Variations and Additions:

  • Add Protein: For a heartier dish, you can incorporate cooked chicken, turkey, or ham into the layers of vegetables. This will turn the gratin into a more substantial main course.
  • Make It Gluten-Free: Swap out the all-purpose flour for a gluten-free flour blend, and use gluten-free breadcrumbs for the topping.
  • Vegan Version: Replace the butter with vegan margarine, the milk with a plant-based alternative (such as almond or oat milk), and use a vegan cheese substitute in place of Gruyère.
  • Boost Flavor with Herbs: While parsley adds a bright, fresh flavor to the dish, you can experiment with other herbs like thyme, rosemary, or basil for a different twist.
  • Add More Vegetables: Consider adding other seasonal vegetables like sliced tomatoes, eggplant, or even mushrooms to the mix for additional flavor and nutrition.

Serving Suggestions

This Squash Gratin with Mornay Sauce can be served as either a main course or a side dish, depending on the occasion. Its creamy, cheesy nature pairs well with a variety of other dishes, making it a versatile addition to any meal.

Serving Ideas:

  • As a Main Dish: Serve with a simple green salad and crusty bread for a complete meal. The gratin is filling enough to stand on its own, but light enough to leave you feeling satisfied rather than overly full.
  • As a Side Dish: This gratin makes an excellent side for roasted meats, poultry, or seafood. It’s a great option for holiday meals, as it complements rich, savory dishes like roast chicken, turkey, or beef.
  • For Brunch: Consider serving this gratin as part of a brunch spread. It pairs beautifully with eggs and can be served alongside breakfast meats or vegetarian dishes for a balanced and hearty brunch.

Why You’ll Love This Recipe

This recipe has something for everyone, from the health-conscious eater to the comfort food lover. Whether you’re looking for a dish to impress at a dinner party or a cozy meal to enjoy at home, this gratin delivers on all fronts. Here’s why it’s a must-try:

  • Flavorful and Satisfying: The combination of tender vegetables, creamy cheese sauce, and crunchy topping is guaranteed to please.
  • Simple Yet Elegant: Despite its gourmet feel, this gratin is easy to make and requires just a few simple ingredients.
  • Versatile: You can customize it with different vegetables, proteins, and herbs to suit your taste or dietary preferences.
  • Impressive Presentation: The golden brown top and vibrant vegetables make this dish as visually appealing as it is delicious.

Conclusion

The Squash Gratin with Mornay Sauce is a delightful fusion of fresh vegetables and rich, cheesy goodness. Its crispy breadcrumb topping, creamy Mornay sauce, and tender layers of squash and zucchini make it a dish that’s both comforting and sophisticated. Whether you’re serving it as a side dish for a holiday meal or as the star of a weeknight dinner, this gratin is sure to impress.

With its versatility, ease of preparation, and mouthwatering flavor, this gratin is a recipe you’ll want to keep in your repertoire for years to come. So go ahead, embrace the art of the gratin, and enjoy the delicious blend of textures and flavors in every bite!

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