Heat olive oil over medium heat. Using a small knife, poke a few holes in each sausage. Brown sausages on all sides. Add water, cover and simmer 10-12 minutes.
Remove lid, remove sausages and set aside. Discard any remaining water.
Add 2 tablespoons butter, Italian seasoning and onions to the pan. Cook 3-5 minutes stirring until onions are slightly softened. Add peppers and cook 2 minutes.
Add garlic, wine, tomatoes if using and sausage. Cook 3-4 minutes or until peppers are tender and sausages reach 165°F.
Top with a sprinkle of fresh herbs (basil/parsley) if desired.
(Nutrition information provided is an estimate and will vary based on cooking methods and brands of ingredients used.)