1/2 lb. ground beef
1/2 T olive oil
1/2 T worcestershire sauce
salt + pepper to taste
mustard
Combine everything but the mustard and mix well. Form into 3 large patties. Grill on one side for about 2 minutes (or grill in a pan over medium heat). Spread mustard on raw side. Flip and cook remaining side. If you want, grill the buns for a minute (or stick them under the broiler with the inside facing up). I like whole wheat buns best. Top with cheese, ketchup, mustard, pickles, lettuce, tomato, and grilled onions.