Tapenade-Filled Burgers

  1. Divide beef into 6 portions. Divide 1 portion in half, then flatten 1 half into a 4-inch patty and form a 1/4-inch rim around patty. Spread 1 1/2 tablespoons of tapenade onto patty within rim. Flatten remaining half into a 4-inch patty, then lay on top of tapenade-covered half and pinch edges together to seal. Pat side to form a straight-sided edge and transfer to a large tray. Make 5 more tapenade patties in same manner and transfer to tray, then refrigerate patties, covered, until ready to grill.
  2. Prepare grill for cooking over direct heat with medium-hot charcoal (moderately high heat for gas); see "<"
  3. >."
  4. Sprinkle patties on both sides with salt and pepper. Lightly oil grill rack, then grill patties (covered only if using a gas grill), turning over once, 3 minutes total for medium-rare. (Burgers will continue to cook slightly after being removed from grill.)
  5. Spread mayonnaise and mustard on buns, then assemble burgers with onion, pickles, and romaine.

ground beef, black, salt, black pepper, buns, mayonnaise

Taken from www.epicurious.com/recipes/food/views/tapenade-filled-burgers-234645 (may not work)

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