Preheat the oven to 400°F. Grease a deep 9 x 13-inch baking dish; set aside. In a Dutch oven over medium heat, cook and crumble the sausage, ground beef and onion until the meat is no longer pink, 5-7 minutes; drain off the fat. Add garlic and tomato paste; cook and stir for 1 minute. Stir in the crushed tomatoes, tomato sauce, water, brown sugar, parsley, basil, salt and ¼ teaspoon pepper. Bring to a boil. Reduce heat to low and simmer, uncovered, until slightly thickened, about 10-15 minutes. In a separate bowl, stir together the egg, ricotta, 1 ¼ cups of Parmesan cheese, and remaining ¼ teaspoon pepper.