# The Ingredients You'll Need:
→ Pasta
01 - 1 pound spaghetti
→ Meat Sauce
02 - 1 pound ground beef
03 - 0.5 pound Italian sausage, casings removed
04 - 1 medium yellow onion, diced
05 - 3 cloves garlic, minced
06 - 24 ounces marinara sauce
07 - 1 teaspoon dried Italian herbs
08 - 0.5 teaspoon salt
09 - 0.25 teaspoon black pepper
→ Alfredo Layer
10 - 15 ounces ricotta cheese
11 - 1 cup Alfredo sauce
12 - 0.5 cup sour cream
13 - 1 large egg
→ Cheeses
14 - 2 cups shredded mozzarella cheese
15 - 1 cup shredded Parmesan cheese
# Step-by-Step Instructions:
01 - Preheat oven to 350°F. Grease a 9x13-inch baking dish.
02 - Cook spaghetti according to package instructions until al dente. Drain and set aside.
03 - In a large skillet over medium-high heat, cook ground beef and Italian sausage, breaking up meat, until browned. Drain excess fat.
04 - Add diced onion and minced garlic to the skillet and sauté for 3 to 4 minutes until softened.
05 - Stir in marinara sauce, dried Italian herbs, salt, and pepper. Let simmer for 5 minutes off heat.
06 - In a bowl, blend ricotta cheese, Alfredo sauce, sour cream, and egg until smooth.
07 - Spread half of the cooked spaghetti in the prepared baking dish. Evenly pour half of the Alfredo mixture over it, followed by half of the meat sauce. Sprinkle with 1 cup mozzarella and 0.5 cup Parmesan.
08 - Repeat the layering with remaining spaghetti, Alfredo mixture, meat sauce, and cheeses.
09 - Cover the dish with foil and bake for 30 minutes.
10 - Remove foil and bake an additional 10 minutes until cheese is browned and bubbly.
11 - Allow to rest for 10 minutes before slicing and serving.