My Dad's Persian Shish Kabob

My Dad's Persian Shish Kabob
1 onion per pound of sirloin steak
sirloin steak
misc veggies you like to grill i.e. cherry tomatoes, mushrooms, onions

1. Cut steak into 1" cubes.
2. Grind or liquefy onions in a food processor.
3. Add meat tenderizer to the onions and mix. Add the meat and cover.
4. Let marinate overnight in the refrigerator.
5. Place meat and veggies on skeweers and grill. Serve with rice. If you know my dad, you don't have a meal without rice.