Directions
Preparing the Vegetables
- Preheat the Oven: Preheat your oven to 375°F (190°C).
- Blanch the Vegetables: Bring a large pot of water to a boil. Add the broccoli and cauliflower florets and cook for 3-4 minutes until they are tender-crisp. Drain and set aside.
Making the Sauce
- Sauté the Aromatics: In a large skillet, heat the olive oil over medium heat. Add the chopped onion and garlic, and sauté until the onion is translucent and fragrant, about 5 minutes.
- Make the Roux: Sprinkle the flour over the onions and garlic, stirring constantly to form a roux. Cook for about 2 minutes.
- Add the Milk: Gradually whisk in the milk, ensuring there are no lumps. Continue to cook, stirring constantly, until the sauce thickens.
- Add the Cheese: Remove the skillet from heat and stir in the shredded cheddar cheese, grated Parmesan cheese, and Dijon mustard. Season with salt and pepper to taste.
Assembling the Casserole
- Combine Vegetables and Sauce: In a large mixing bowl, combine the blanched broccoli and cauliflower with the cheese sauce. Mix until the vegetables are well-coated.
- Transfer to Baking Dish: Pour the mixture into a greased baking dish, spreading it out evenly.
Topping and Baking
- Prepare the Topping: In a small bowl, mix the breadcrumbs with the melted butter until well combined.
- Add the Topping: Sprinkle the breadcrumb mixture evenly over the top of the casserole.
- Bake: Place the casserole in the preheated oven and bake for 25-30 minutes, or until the top is golden brown and the casserole is bubbly.
Serving
- Garnish: Garnish with fresh parsley if desired.
- Serve: Let the casserole cool for a few minutes before serving. Enjoy it as a main course or as a side dish to complement your meal.
Kitchen Equipment Needed
- Large pot
- Large skillet
- Whisk
- Mixing bowls
- Baking dish
- Small bowl
- Spatula
Tips for Perfect Broccoli and Cauliflower Casserole
- Blanching Vegetables: Blanching the vegetables helps them retain their vibrant color and ensures they are tender without becoming mushy.
- Cheese Selection: Feel free to experiment with different cheeses. Gruyère or mozzarella can be great substitutes for cheddar.
- Breadcrumb Topping: For added flavor, mix in some grated Parmesan or herbs like thyme or rosemary with the breadcrumbs.
Storing Leftovers
Store any leftover casserole in an airtight container in the refrigerator for up to 3 days. To reheat, place the casserole in a preheated oven at 350°F (175°C) for about 15 minutes, or until heated through. You can also microwave individual portions for a quick meal.