Cheesy Zucchini Gratin Recipe
Zucchini gratin is the perfect side dish for summer. Sautéed zucchini in a cheesy, creamy sauce is topped with a crunchy breadcrumb topping and baked until golden brown.
Servings: 8 Servings
Equipment
Ingredients
- 3 tablespoons butter
- 1 large yellow onion sliced
- 1 clove garlic minced
- 4 medium zucchini cut into 1/4" thick slices
- ¼ teaspoon ground nutmeg
- ½ teaspoon salt
- ⅛ teaspoon pepper
- 2 tablespoons flour
- 1 cup heavy cream 10%
- ½ cup milk
- 1 teaspoon lemon zest
- 1 ½ cup Gruyere cheese grated
- 1 cup bread crumbs
- 1 tablespoon butter for topping before baking
Instructions
- Preheat the oven to 400 degrees Fahrenheit. Grease a large casserole dish, at least 2.5 quart capacity, and set aside.
- In a large skillet, melt the butter over medium heat. Add the sliced onion and cook for 5–7 minutes, until softened. Stir in the garlic and zucchini and cook for another 5 minutes, stirring occasionally.
- Season with nutmeg, salt, and pepper, then sprinkle in the flour and stir well to coat the vegetables.
- Pour in the milk and cream, followed by the lemon zest. Cook over medium-low heat for 3–4 minutes, stirring frequently, until the mixture thickens slightly. Taste and adjust seasoning if needed.
- Transfer the mixture to casserole dish.
- In a small bowl, combine the Gruyere and breadcrumbs. Sprinkle evenly over the zucchini mixture, then dot the top with small pieces of butter.
- Bake for 20 minutes, until golden and bubbling. Serve warm.
Notes
- Slice zucchini evenly. Keeping the rounds similar in thickness helps them cook at the same rate so you don’t end up with some mushy and some firm pieces.
- This cheesy casserole pairs with almost any main course. It's delicious alongside roast chicken, steak, pork, salmon, or baked ham.
- Allow the zucchini gratin to rest for a few minutes before serving to let the sauce set up.
Nutrition
Serving: 1Serving | Calories: 346kcal | Carbohydrates: 17g | Protein: 12g | Fat: 26g | Saturated Fat: 16g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 7g | Trans Fat: 0.2g | Cholesterol: 78mg | Sodium: 488mg | Potassium: 380mg | Fiber: 2g | Sugar: 6g | Vitamin A: 1068IU | Vitamin C: 19mg | Calcium: 335mg | Iron: 1mg