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preheat grill
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divide the meat into 4 equal portions and shape into burgers
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season with salt and pepper.
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cook the burgers for 4 minutes per side
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grill tomatoes, flipping to char each side and remove
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top the burgers with the mozzarella cheese and close the grill cover
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melt the cheese for 1 minute
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place the burgers on the rolls and top with the grilled tomatoes