Baked Tortellini Casserole Ingredients 2 tablespoons of olive oil 1 pound of lean ground beef 97/3 Small yellow onion, diced 2 garlic cloves, minced 1 28oz can of crushed tomatoes, or whole peeled tomatoes crushed by hand 1 8 oz can of tomato sauce 1 teaspoon of kosher salt Freshly ground black pepper to taste