Preheat the grill to medium high heat. In a small bowl, combine olive oil, M&B Sumac, M&B Oregano, M&B Thyme, M&B Basil, M&B Lemon Pepper, and salt. Mix to fully combine.
Slice heirloom tomatoes about ¼ inch thick. Drizzle each slice with herbed oil. Lay each tomato slice on the grill, let sit for 4-6 minutes. Gently flip, and grill for 2-3 more minutes, then remove from the grill. Enjoy alone, or on top of pastas, pizzas, salads, and more!