Ordinary yellow mustard gives a distinctive flavor to the marinade for these beef kebabs. The heavenly smell that fills your kitchen while you make the marinade lets you know it's going to be good. Serve with assorted grilled vegetables (like cherry tomatoes, zucchini, mushrooms, bell pepper, and corn on the cob), and baked potatoes. Beverly is the food editor of the local paper- her father used to grill these. Recommended for Father's Day menu.