Preheat the grill to medium-high heat.
Drizzle 2 tbsp. of olive oil over the sliced tomatoes and season to taste.
4 plum tomatoes, 4 tbsp. olive oil, Sea salt and freshly ground black pepper
Place sliced tomatoes on the grill and cook until charred and soft, 4 to 6 minutes per side.
4 plum tomatoes
Remove tomatoes, and let cool.
Season the steaks to taste, then grill for 3 to 4 minutes per side and let rest for about 4 minutes.
2 to 4 steaks
Chop the tomatoes and place them in a bowl. Add basil, parsley, vinegar, garlic, crushed red pepper, and remaining olive oil, then toss to combine.
¼ cup fresh basil, 2 tbsp. fresh flat-leaf parsley leaves, 2 tbsp. balsamic vinegar, 2 garlic cloves, ¼ tsp. crushed red pepper
Serve the steak topped with tomato-basil salsa.