Grilled Hamburger

Ingredients

• 1/2 c. sour cream
• 3 green onions, chopped
• 3 Tbsp. bread crumbs
• 1/2 tsp. Worcestershire sauce
• 1/2 tsp. pepper
• 1 lb. lean ground beef
• hamburger buns
• shredded lettuce
• 1 tomato, sliced
• 1 yellow onion, sliced
• 2 tsp. mustard
• 1 Tbsp. mayonnaise
• 1 Tbsp. catsup