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Spaghetti Squash Casserole

With all of the flavors of a classic lasagna, this casserole is actually packed with vegetables thanks to a base of spaghetti squash. You can bake this in almost any dish, but I love to spread it out on a sheet pan and broil it so that there are tons of crispy bits around the edges and on the top.
Prep Time10 minutes
Cook Time45 minutes
Total Time55 minutes
Course: Main Dish
Keyword: healthyish, sheet pan recipe, spaghetti squash, squash, vegetarian, vegetarian casserole
Servings: 4
Author: Jess Smith via Inquiring Chef
Cost: $8.00

Equipment

  • Half Sheet Pan

Ingredients

  • 1 medium spaghetti squash (2 ½ to 3 pounds)
  • 1 tablespoon olive oil
  • 1 1/2 cups marinara sauce, plus extra for serving if you’d like
  • 1 cup grated provolone or mozzarella cheese
  • 1 cup whole milk ricotta cheese
  • 1/2 cup grated parmesan cheese
  • black pepper
  • fresh basil leaves, for topping

Instructions

  • Preheat the oven to 400°F.
  • Spray a rimmed baking sheet with nonstick cooking spray or brush it with cooking oil.
  • Roast the squash in one of two ways. First, you can slice it in half through the flesh (not stem-to-stem). Place the squash cut-side down on a rimmed baking sheet and roast until tender, 25 to 30 minutes. OR, if you prefer not to mess with slicing through the raw squash and have a bit more time, just pierce the whole squash 10 times all over with a fork. Place it on a rimmed baking sheet and roast the entire squash until tender, 50 to 60 minutes.
  • Let the squash cool until you can safely handle it. While the squash cools, carefully move an oven rack so that it is about 8 inches below the heat source. Turn on the oven’s broiler.
  • If not sliced, slice the squash in half through the peel (not stem-to-stem). Scrape out and discard the seeds (or roast them separately like you would pumpkin seeds). Use a fork to scrape out the strands of squash. Combine them with marinara and provolone or mozzarella cheese.
  • Spread the squash out in a thin layer on the prepared baking sheet. Use a spoon to scoop and drop ricotta cheese all over the surface of the squash in roughly 1 tablespoon portions. Scatter the parmesan cheese over the entire dish.
  • Broil the squash until crisp and golden in places all over the top and sides, 6 to 8 minutes (keep a close eye on it since the intensity of broilers can vary).
  • Top the casserole with black pepper and fresh basil leaves. Slice into squares and serve warm, with warm marinara on the side if you’d like it a bit more saucy.

Nutrition

Calories: 373kcal | Carbohydrates: 26g | Protein: 22g | Fat: 22g | Saturated Fat: 13g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 6g | Cholesterol: 65mg | Sodium: 987mg | Potassium: 667mg | Fiber: 5g | Sugar: 10g | Vitamin A: 1362IU | Vitamin C: 12mg | Calcium: 557mg | Iron: 2mg