Leftover Spaghetti Lasagna

Step 1
Preheat oven to 400 degrees F (200 degrees C).

Step 2
Grease a 9×13-inch baking dish.

Step 3
Fill a large pot with lightly salted water and bring to a rolling boil. Stir in spaghetti and return to a boil. Cook until pasta is tender but still slightly firm, about 10 minutes. Drain well.

Step 4
Transfer spaghetti to a large bowl and toss with spaghetti sauce until well combined.

Step 5
Mix cottage cheese and sour cream in a bowl.

Step 6
Spread half the spaghetti with sauce into the prepared baking dish.

Step 7
Spread the cottage cheese mixture evenly over the spaghetti.

Step 8
Place the remaining spaghetti and sauce in an even layer over the cottage cheese mixture; sprinkle with mozzarella cheese.

Step 9
Bake in the preheated oven until bubbly and the cheese is browned, 30 to 40 minutes.