I have a question about a recipe I am making for dinner tonight ...

I am making meatloaf meatballs (basically meatloaf but smaller and cooler) and the recipe calls for 1lb ground beef, 2 spicy Italian sausages & 4 sweet sausages but I only have spicy sausages. What can I add to the meat to give it some sweetness? The other ingredients are red bell peppers, onion, garlic, eggs, breadcrumbs, parmesan, and parsley.