Absolutely organic and delicious!
Prepare barbecue (medium-high heat). Combine meat, onion, parsley, Worcestershire sauce, salt and pepper in medium bowl; blend well.
Divide meat mixture into 4 equal portions. Shape each into ball. Poke deep hole in each ball and fill each with cheese. Mold meat around cheese to enclose. Flatten each filled burger to 3/4-inch-thick patty.
Grill burgers to desired doneness, about 5 minutes per side for medium and 7 minutes per side for well done burgers.
Serve open faced on a great sourdough bread with chopped lettuce, sliced tomato, and your favorite condiments.