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Quick vegetable casserole being pulled out from dish with spatula with cheese stretching out.
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Vegetable Casserole

This vegetable casserole is made with frozen vegetables and spiral pasta in a creamy white sauce!
Course Main Course
Cuisine American
Keyword casserole
Prep Time 15 minutes
Cook Time 55 minutes
Total Time 1 hour 10 minutes
Servings 6 serves
Calories 433kcal

Equipment

  • 9x13 rectangle casserole dish

Ingredients

Frozen Vegetables

  • 3 heaping cups frozen mixed vegetables
  • 1 cup frozen peas

Pasta

  • 1 1/2 cups uncooked fusilli/spiral pasta, you need approximately 3 cups cooked pasta (370g/13 oz.)
  • 1/2 Tbsp salt

White Sauce

  • 90 g unsalted butter
  • 6 tbsp all-purpose flour
  • 3 1/2 cups whole milk
  • 1/4 tsp ground nutmeg
  • Salt and pepper, to season
  • 2 cups shredded cheddar cheese, divided

Instructions

  • Preheat Oven & Prepare Casserole Dish: Set your oven to 400ºF (200ºC). Grease a 9x13 inch rectangle casserole dish with butter or oil cooking spray. Set aside.
  • Thaw Veggies Partially: Take out the frozen vegetables and set them aside at room temperature. No need to completely thaw, just allow them to become slightly less frozen.
  • Cook Pasta: Bring a pot of water (half-filled) to a boil, add 1/2 tablespoon of salt, and then add the pasta. Cook according to the packet instructions until al dente, which took me about 9 minutes. Once cooked, drain the pasta and set it aside.
  • Melt Butter: In a large deep skillet or pot, melt butter over low heat.
  • Make Roux: Once melted, whisk in the flour. Increase the heat to medium, and cook the mixture for 1 minute as it bubbles/simmers, whisking continuously.
  • Add Milk: Gradually pour in the milk, whisking constantly over medium heat.
  • Thicken Sauce: Continue cooking and whisking until the sauce thickens, taking care not to let it boil.
  • Season: Once thickened, reduce the heat to low, add ground nutmeg and season with salt and pepper to taste. Whisk well.
  • Combine, Veggies, Pasta & Cheese: Add the partially thawed vegetables, the cooked pasta and 1 cup of cheese to the white sauce. Mix until everything is well coated.
  • Assemble Casserole: Transfer the mixture into the greased casserole dish. Sprinkle the remaining 1 cup of cheese evenly over the top.
  • Bake: Bake for 30-35 minutes, or until the top is golden and the casserole is bubbling.
  • Serve: Remove from the oven and let it side for 5 minutes before serving. Enjoy!

Notes

  • Store: Cool the casserole completely and store it in an airtight container in the fridge for up to 3-4 days.
 
  • Freeze: You can also freeze the casserole, either whole or in portions. Wrap it well in plastic wrap and foil, label it with the date and freeze for up to 2 months.
 
  • Reheat: Thaw overnight in the fridge if frozen, then reheat in the oven at 180ºC (350ºF) until warmed through.

Nutrition

Calories: 433kcal | Carbohydrates: 25g | Protein: 17g | Fat: 30g | Saturated Fat: 18g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 7g | Trans Fat: 0.5g | Cholesterol: 87mg | Sodium: 321mg | Potassium: 313mg | Fiber: 2g | Sugar: 7g | Vitamin A: 3199IU | Vitamin C: 3mg | Calcium: 455mg | Iron: 1mg