Preheat oven to 350 degrees and lightly grease a 9x13 baking dish set aside.

Bring a pot of well salted water to a boil. Cook noodles, stirring occasionally until cooked through and firm to the bite, about 12 minutes. Drain. Place noodles into bottom of prepared pan.

Meanwhile, in a large skillet over medium heat, cook and stir ground beef, sausage and onion until browned and onions are soft. Drain off any excess grease. Stir in marinara sauce and garlic powder.

In a bowl, combine the sour cream, egg and Parmesan cheese. Spread over the top of the spaghetti noodles. Sprinkle on 2 cups of mozzarella cheese.

Top with meat sauce and remaining cheese. Cover with foil. Bake in preheated oven for 30 minutes. Remove the foil and bake for an additional 15 minutes, until cheese is melted and bubbly.

To Freeze When preparing this recipe for the freezer, I use (5) 8-inch foil pans. I follow the recipe above, dividing the ingredients equally between the pans. Once the pans are ready I wrap in foil and then twice in plastic wrap. Be sure to add a label with the name of the dish and cooking directions. Before serving, thaw overnight in the refrigerator and bake using the above directions. You might have to add on an additional 5-10 minutes.