Preheat grill. Grill sausage to desired doneness and set aside, keeping warm.
Preheat sauté pan over medium-high heat. Add olive oil and peppers. Sauté for a couple of minutes until softened. Add garlic and sauté for another couple of minutes. Then add chicken stock and seasonings. Stir to incorporate all flavors and simmer over medium-high heat until stock is reduced by half, about five minutes.
For plate service, place sausage onto a large platter and spoon peppers on top.