Brown the sausage: Heat 1 tablespoon olive oil in a large skillet over medium heat. Add sausage links and cook, turning occasionally, until browned on all sides, about 6–8 minutes. Transfer to a plate.
They don’t need to be fully cooked yet.
Cook the onions and peppers: In the same skillet, add the remaining 1 tablespoon olive oil. Add the sliced onion and peppers with a pinch of salt. Cook, stirring occasionally, until softened and lightly caramelized, 8–10 minutes.
Add garlic and spices: Stir in the garlic, oregano, crushed red pepper flakes, and smoked paprika.
Cook until fragrant, about 30 seconds.
Build the sauce: Stir in the tomato paste and cook for 1 minute to caramelize slightly. Pour in the chicken broth and scrape up any browned bits from the bottom of the pan.
Finish the sausage: Return the sausage to the skillet. Reduce heat to medium-low, cover, and simmer 5–8 minutes, or until the sausage is cooked through (internal temperature 160°F for pork or 165°F for poultry).
Add brightness: Uncover and stir in the red wine vinegar.
Taste and adjust salt and pepper. If you want a saucier skillet, splash in a bit more broth.
Garnish and serve: Sprinkle with chopped basil or parsley. Serve hot over rice, pasta, or polenta, or tuck into warm rolls for classic sausage-and-pepper sandwiches.