Baked Ziti

Ingredients:
1 lb. dry ziti pasta
1 1/2 TBS. olive oil
1 onion, sliced
4 cloves garlic, chopped
1/2 lb. ground beef
1/2 lb. ground pork sausage
1 and 1/2 (26 oz. each) jars spaghetti sauce (I love Ragu Garden Combination)
salt to taste
1 (6 oz.) package Provolone cheese, sliced
3/4 cup sour cream
3/4 cup Ricotta cheese
1 (6 oz.) pkg. shredded Mozzarella
2 TBS. grated Parmesan cheese

Directions:
1. Bring a large pot of slightly salted water to boil. Cook pasta in boiling water for 8 to 10 minutes, or until al dente; drain.
2. Meanwhile, heat olive oil in a large, heavy skillet over medium heat. Cook onion in oil until tender. Stir in garlic. Transfer to a small bowl.
3. Place ground beef and sausage in the skillet. Cook over medium-high heat until evenly brown. Drain. Stir in the onion mixture and the spaghetti sauce. Season with salt. Reduce heat to low and simmer for 10 minutes.
4. Preheat oven to 350 degrees. Grease a 9 x 13 baking dish. In the prepared dish, layer 1/2 of the cooked pasta, Provolone cheese, sour cream, Ricotta cheese, and a little less than half of the meat mixture. Then layer the rest of the pasta, Mozzarella cheese, remaining meat mixture, and Parmesan cheese.
5. Bake in the preheated oven for 20 to 30 minutes, or until heated through and cheeses are melted.

I usually cook 1 pound each of the ground beef and sausage before hand. I keep half for now and freeze the other half for the next time I make this recipe.