Go Back
+ servings
Quick vegetable casserole being pulled out from dish with spatula with cheese stretching out.
Print

Easy Frozen Vegetable Casserole

Easy Frozen Vegetable Casserole made with mixed vegetables, pasta, creamy white sauce and melted cheese. Feeds the whole family!
Prep Time 15 minutes
Cook Time 55 minutes
Total Time 1 hour 10 minutes
Servings 6 serves
Calories 510kcal

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
  • 3 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, about 1/2 cup at a time, whisking well after each addition. Continue cooking and whisking over medium - high heat until the sauce thickens, taking care to not let it boil.
  • Season: Once thickened, reduce the heat to low, add ground nutmeg and season with salt and pepper to taste. Whisk well.
  • Add Cheese: Add 2 cups of cheese and whisk until melted through.
  • Combine, Veggies, Pasta & Cheese: Add the partially thawed vegetables and the cooked pasta 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 35-40 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!

Video

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: 510kcal | Carbohydrates: 26g | Protein: 21g | Fat: 36g | Saturated Fat: 21g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 8g | Trans Fat: 0.5g | Cholesterol: 106mg | Sodium: 1026mg | Potassium: 328mg | Fiber: 2g | Sugar: 7g | Vitamin A: 3413IU | Vitamin C: 3mg | Calcium: 588mg | Iron: 1mg