Ingredients
1 1/2 pounds flank steak
Fine sea salt and freshly ground black pepper
6 thyme sprigs
3 garlic cloves, finely grated or mashed to a paste
1 jalapeño, minced
2 tablespoons minced chives, plus more for serving
2 tablespoons Worcestershire sauce
1 tablespoon coconut palm sugar or dark brown sugar
1 tablespoon fresh lemon juice, plus more as needed
3 ripe plum tomatoes
Extra-virgin olive oil
3 scallions, white and green parts, thinly sliced
Handful of torn fresh basil, plus more for serving
1/2 cup unsalted butter (1 stick), softened
1 tablespoon chopped fresh thyme
1 tablespoon minced chives
2 teaspoons Worcestershire sauce
1 garlic clove, grated or mashed to a paste
Finely grated zest of 1 lemon
1/4 teaspoon fine sea salt, plus more to taste
1/2 teaspoon freshly ground black pepper
Directions
1
Season steak all over with 1 teaspoon salt and 1/2 teaspoon pepper. In a bowl or resealable bag, combine thyme, garlic, jalapeño, chives, Worcestershire sauce, sugar and lemon juice. Add meat and let marinate in the refrigerator for at least 2 hours and up to overnight.
2
Prepare the Worcestershire butter: In a bowl, mash together the butter, thyme, chives, Worcestershire sauce, garlic, lemon zest, salt and pepper.
3
Spoon the butter onto a piece of parchment paper or plastic wrap, form into a log and wrap well. Chill for at least 2 hours before using.
4
Light the grill or heat the broiler, arranging the rack about 4 inches from the heat source. Grill tomatoes, or broil them on a rimmed baking pan, turning them, until charred on all sides, about 2 to 4 minutes per side. Transfer to a cutting board to cool.
5
Brush off any pieces of marinade clinging to the steak, pat steak dry and coat it lightly with oil. Grill or broil steak until it reaches desired doneness, 3 to 5 minutes per side for medium-rare (125 degrees).
6
Transfer steak to a cutting board. Slice butter into coins and place them on the steak to melt slightly. Let steak rest for 5 minutes while you prepare the tomatoes.
7
Roughly chop tomatoes and place in a bowl with scallions, basil, a pinch of salt and pepper, a drizzle of olive oil and a squeeze of lemon juice. Toss well, adding more salt or lemon juice, or both, to taste.
8
Slice the steak thinly, across the grain, and serve with the charred tomato mixture spooned on top. Garnish with more chives and torn basil, if you like.