Stuffed Cheesy Shells
21 pieces jumbo pasta shells, cooked
2 tablespoons onion powder
3 cups homemade spaghetti sauce or store bought spaghetti sauce, divided
1 1/2 teaspoons salt
1/2 teaspoon garlic powder
1 1/2 lbs low-fat tofu, mashed
1/2 teaspoon basil...