Preheat grill on medium to medium-high.
In a small bowl combine the mustard, onion powder, garlic powder, rosemary and Worcestershire. Remove ⅓ of the mustard sauce and reserve to enjoy at the table.
Rub the kabobs with the remaining mustard sauce and season with salt and pepper.
Place kabobs onto the grill and cook until kabobs are done. About 7-8 minutes, making sure to rotate the kabobs so they cook evenly.
Remove the kabobs from the grill and serve with the mustard sauce and Cal & Gary’s Garden Salad.