Easy Baked Spaghetti Recipe with Mozzarella

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This easy baked spaghetti has ground beef, marinara sauce, a middle layer of creamy pesto, and mozzarella cheese. Pure comfort!

Ingredients for 8 servings

1 pound pasta, such as spaghetti or linguini
1 tablespoon olive oil
1 medium onion, chopped
1 pound lean ground beef
6 cups marinara sauce, see our homemade marinara sauce recipe (or substitute with two 26-ounce jars store-bought sauce)
3/4 cup sour cream
1/4 cup basil pesto, see our homemade basil pesto recipe
4 ounces mozzarella cheese, coarsely grated (about 1 cup)
Salt and fresh ground black pepper