Honey Mustard Grilled Chicken

1/2 cup mayonnaise
2 Tblsp. Deli mustard
1 Tblsp. honey
1 tsp. cider vinegar
2 green onions, chopped
Salt and pepper to taste
4 boneless, skinless chicken breasts

Blend first 5 ingredients.  Season with salt and pepper.  Grill or broil chicken.  Brush with 2/3 of mixture until fully cooked.  Served with remaining 1/3 of mixture.