Position an oven rack 4 inches from the broiler; preheat the broiler. Heat a large ovenproof skillet (preferably cast-iron) in the oven for 10 minutes.
Rub the steaks with 2 tsp. EVOO and the cut sides of the garlic clove; season generously. Broil the steaks in the heated skillet, flipping halfway through, 5 to 7 minutes for medium-rare. Transfer to a cutting board and let rest for 5 minutes.
Meanwhile, in a medium bowl, toss the tomatoes with the remaining 1 tbsp. EVOO, the parsley, basil, shallot and lemon juice; season. Serve alongside the sliced steak.
Quick Hack for Cutting Cherry Tomatoes