In a large skillet over medium heat, cook ground beef and sausage until no longer pink; drain grease. Add tomato sauce, tomato paste, garlic, sugar, Italian seasoning, rosemary, salt and pepper. Bring to a boil. Reduce heat and simmer, uncovered for 30 mins, stirring occasionally.
I always make this the night before and DO NOT cook the noodles (I just use regular noodles, not the no-boil kind). I cover it with foil and refrigerate it overnight. The noodles begin to soften overnight and then by baking it covered with foil for the first hour, they turn out perfectly. This saves me the time and hassle of having to boil the noodles and I love making it the night before so it's already to throw in the oven the day I serve it. If you make this the day of, then make sure you boil the noodles before hand or use the no-boil noodles.