In a large skillet with a lid, heat olive oil over medium-high heat. Add sausages and onion; cook, turning the sausages to brown all sides, until onions are just tender, about 8 minutes. Add garlic and bell peppers and cook another couple of minutes. Add tomatoes, water, pasta, basil, mint, salt and pepper (make sure pasta is submerged and keep pushing pasta down into the soup- do not add more water). Raise heat to high and cook until liquid starts to boil. Turn the heat to medium-low, cover, and simmer until the sausages feel firm and the pasta is tender, about 25 minutes. Cut the sausages into slices or leave whole for serving.