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1
Heat a grill to medium-high.
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2
Meanwhile, sprinkle the steak with salt and pepper.
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3
Rub the tomatoes and onion slices with the oil and sprinkle with salt and pepper.
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4
Grill the steak, turning once, until medium-well (12 to 15 minutes).
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5
Transfer to a cutting board and let rest for 5 minutes.
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6
Grill the tomatoes and onions next to the steak, turning once, until charred and softened, about 5 minutes for the tomatoes and 10 minutes for the onions.
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7
Transfer the tomatoes to a cutting board.
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8
When cool enough to handle, cut into wedges and transfer to a bowl, along with the Worcestershire sauce.
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9
Toss until well mixed.
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10
Cut the steak into thin slices against the grain and transfer to a serving platter, along with the onions.
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11
Spoon the tomatoes with their juices all over and sprinkle the cheese and parsley on top.
