5 from 1 vote
Vegetable Pasta Bake Dinner
Roasted Vegetable Pasta Bake
Prep Time
20 mins
Cook Time
35 mins
Total Time
55 mins

This vegetable pasta bake is so hearty, no one will even care that it’s meatless. Flavorful roasted vegetables and protein packed lentil pasta are tossed in a rich pesto marinara sauce. Baked with a topping of mozzarella and Parmesan cheeses, this gluten free vegetarian casserole is sure to become a family favorite.

Course: Main
Keyword: casserole, gluten free, vegetable pasta bake, vegetables, vegetarian, vegetarian casserole
Servings: 6
Calories: 467 kcal
Author: Diana Johnson
  • 8 ounces Modern Table Penne Pasta
  • 1 red bell pepper
  • 1 yellow bell pepper
  • 1 medium zucchini
  • 1 small sweet potato
  • 1/2 red onion
  • 8 baby bella mushrooms aka crimini mushrooms
  • 5 garlic cloves unpeeled
  • spray olive oil
  • 1 teaspoon kosher salt
  • 3 cups marinara sauce
  • 1/2 cup pesto sauce
  • 3 cups shredded mozzarella divided
  • 1/2 cup shredded Parmesan
  • chopped parsley
  1. Preheat oven to 450 degrees F.

  2. Cook pasta according to package instructions, but drain 5 minutes early. Noodles will continue cooking in the casserole.

  3. Chop your vegetables to slightly smaller than bite sized pieces and arrange in a single layer on a baking sheet. Leave garlic cloves whole in their peel. Spray with olive oil and sprinkle with salt.

    How to Roast Vegetables for Vegetable Pasta Bake
  4. Roast vegetables at 450 degrees F for 20 minutes, until tender and lightly caramelized.

    Roasted Vegetables for Vegetable Pasta Bake
  5. Mix roasted vegetables with cooked pasta in a large bowl.

    Sauces and Cheese for Vegetable Pasta Bake
  6. Add marinara sauce and pesto sauce to pasta and vegetables. Mix well.

    Sauces for Roasted Vegetable Pasta Bake
  7. Mix in two cups of mozzarella cheese. 

    Mixing Cheese into Vegetable Pasta Bake
  8. Pour the mix into a baking dish.

    Vegetable Pasta Bake in Casserole Dish
  9. Top vegetable pasta bake with 1 cup mozzarella cheese and 1/2 cup Parmesan cheese.

    Vegetable Pasta Bake Ready to Cook
  10. Bake uncovered for 15 minutes at 450 degrees F. Casserole is done when cheese is melted and sauce is bubbling.

    Vegetable Pasta Bake Casserole
  11. Sprinkle with chopped parsley before serving for a pop of color.

Recipe Notes

If you'd like to make the casserole in advance, follow all the steps up until cooking the complete casserole. Cover and refrigerate. When ready, cook 35 minutes at 450 degrees F.

If you'd like to freeze the casserole you can thaw before cooking and cook for 35 minutes at 450 degrees F. Or you can cook from frozen. To cook from frozen, cover with foil and cook 40 minutes at 450 degrees F. Then uncover and cook another 15 minutes until cheese is melted and sauce is bubbling.