01 - In a shallow dish, whisk together olive oil, tamari, maple syrup, apple cider vinegar, vanilla extract, minced garlic, thyme, rosemary, parsley, black pepper, lemon zest, and sea salt until well combined.
02 - Place tempeh slices into the marinade, ensuring each piece is evenly coated. Cover and refrigerate for at least 30 minutes, turning once halfway through. For deeper flavor, marinate up to 2 hours or overnight.
03 - Heat a large nonstick skillet or grill pan over medium heat until hot.
04 - Remove tempeh from marinade, reserving excess marinade. Place slices onto the hot pan and cook for 3 to 4 minutes per side, until golden brown and slightly crisp.
05 - During the final minute of cooking, pour the reserved marinade over the tempeh slices, allowing it to bubble and coat evenly.
06 - Transfer tempeh steaks to plates, garnish with fresh herbs, and serve alongside lemon wedges.