Coat a large, nonstick skillet with olive oil cooking spray, and setover medium heat. Sauté sausage approximately 5 minutes or until browned; remove to a plate, and cover to keep warm.
Pour oil into the same skillet and heat about 45 seconds. Add garlic, and sauté until golden, about 30 seconds.
Add onion then sauté 3 minutes. Add peppers, and cook until vegetables are softened, about 6-8 minutes more.
Stir in vinegar, and then return sausage to skillet; toss to combine.
Serve over sliced and toasted bread.