These Grilled Steak Kabobs have tender sirloin steak marinated overnight then grilled until caramelized with veggies and onions!
Add steak and the rest of the rest of the marinade ingredients to a ziplock bag. Toss to coat and place in the refrigerator for at least 2 hours or overnight.
Toss the chopped up peppers and onions in the remaining tablespoon of oil.
Remove the steak from the marinade and thread the steak, veggies and onions onto the skewers.
Grill skewers AT 425F for 6-8 minutes or until your desired doneness.
Serve immediately with parsley for serving, if desired.