01 - Whisk together olive oil, balsamic vinegar, garlic, oregano, smoked paprika, black pepper, and salt in a large bowl until fully combined.
02 - Add sausage pieces, bell peppers, onion, and cherry tomatoes to the bowl. Toss thoroughly to coat evenly. Let marinate for 10 minutes.
03 - Heat grill or grill pan to medium-high temperature.
04 - Thread sausage, peppers, onion, and tomatoes alternately onto metal or soaked wooden skewers.
05 - Grill for 12–15 minutes, turning occasionally, until sausages are cooked through and vegetables are tender with light charring.
06 - Serve hot, garnished with chopped parsley and accompanied by lemon wedges.