Greek Steak Salad

Heat grill or ridged grill pan over high heat 1 minute. Add steak; sprinkle with 1/4 tsp salt and 1/4 tsp pepper. Cook steak 7-9 minutes, turning once, for med-rare or until desired doneness. Transfer to cutting board. Meanwhile, in large bowl, with wire whisk, whisk lemon juice, oil, remaining 1/4 tsp salt, and 1/4 tsp pepper. Add romaine, cucumber, tomatoes, and feta to dressing; toss to coat. Thinly slice steak on diagonal across the grain. Serve on salad with warmed pita on the side.