Preheat grill to medium heat.

In a bowl, combine chicken, steak sauce, garlic, salt, pepper & pesto. Form into 4 patties.

Brush patties with oil to avoid sticking on the grill.

Place patties on grill and cook about 5 minutes each side, or until cooked through.

Place mozzarella on top of patties and close cover of grill for 1 min to help cheese melt.

Toast buns on the grill if desired.

Place patties on buns and garnish with torn basil leaves if desired.