Heat a large saucepan over medium heat.
Coat the pan with olive oil. Add in the diced green bell pepper and onion. Sauté until soft, about 5 minutes.
Add in the minced garlic and sauté for 1-2 minutes, stirring constantly to make sure the garlic doesn't burn.
Add the lump sausage into the pan and cook for about 10-12 minutes, or until the sausage is browned and cooked through.
Add beans and tomatoes. Stir to combine.
Sprinkle in the oregano, basil, salt and pepper.
Reduce the heat to medium-low and cook for 10-15 minutes, until stew is heated through.
Top with parmesan cheese and fresh basil before serving.