4 Italian sausage links (sweet, hot, or a couple of each)
2 Tbsp olive oil
1 green bell pepper, sliced into 2 to 3 inch long strips
1 red bell pepper, sliced into 2 to 3 inch long strips
1 bell pepper of another color (yellow or orange or purple), sliced into strips 2-3 inches long
4 garlic cloves, sliced into slivers
1 large sweet or yellow onion, sliced into 1/4-inch half-moons
1 small (15 ounce) can of crushed tomatoes
1 Tbsp of dried oregano
1/2 cup Marsala or red wine (optional)
1/2 teaspoon red pepper flakes (optional)
Salt to taste