2 T. olive oil
1/4 c. dry white wine
1 T. chunky garlic paste or 3 cloves garlic, minced
Juice from 1 grapefruit
1 t. dried thyme or 1 T. fresh
1 lb. sirloin steak, cut into 1" squares
1 onion, cut into chunks
2 red bell peppers, cut into chunks
12 oz. cherry tomatoes
Place the olive oil, wine, garlic, juice and thyme in a gallon size sealable plastic bag and shake vigorously to combine. Add the steak chunks and refrigerate for at least 3 hours.
Alternate the meat chunks with the vegetables onto skewers. If using wooden skewers you will want to soak them in water for half an hour before using. Place the skewers on a hot grill for about 5 minutes per side, brushing often with the leftover marinade.