Garden Herb Burgers

2 lbs lean ground beef (93/7)
1/2 cup sour cream
1 tbl minced fresh parsley
2 tsp minced fresh rosemary
2 tsp salt
2 tsp pepper
1/2 tsp granulated garlic

Chipotle mayonnaise

1 cup mayonnaise
1 chipotle pepper, pureed in food processor

Combine all ingredients together in mixing bowl, mixing well with hands. Form 8-10 equal sized patties. Grill on each side for 3-4 minutes each until reaches medium temperature. Serve on firm hamburger buns with marinated grilled onions and chipotle mayonnaise.