Whisk together ½ tablespoon of olive oil, sesame oil, vinegar, maple syrup, tamari, salt, cayenne, onion powder, smoked paprika, and liquid smoke in a medium bowl.
Slice the tempeh crosswise into thin strips, almost as thin as you can, about ⅛ inch thick (.3 cm thick).
Marinate the tempeh. Transfer the tempeh to a ziploc bag or a shallow pan (like a pie plate) and pour on the marinade. Seal the bag and massage to coat. Marinate in the fridge for at least 1 hour, or 8 hours or overnight for the most flavor. Gently shake or flip the bag a few times during this time to evenly distribute the marinade, or toss the tempeh in the shallow pan. Cook the tempeh bacon. Heat a 12-inch nonstick frying pan over medium heat with 1 tablespoon of olive oil. Once the oil is shimmering (it might take a few minutes), arrange about HALF of the tempeh slices or as many as you can in a single layer, leaving behind excess marinade. NOTE: Don't try to cook all the tempeh at once, or it won't crisp up. Cook for 3 ½ to 4 minutes. About 1 minute before flipping, generously brush the top side of each tempeh piece with some of the reserved marinade.
Now flip each piece and cook on the second side for 2 to 2 ½ more minutes until seared on the other side, generously brushing more marinade on the top in the last minute.
Wipe out the pan. Repeat with the rest of the tempeh and ½ tablespoon of olive oil (you shouldn’t need a full tablespoon since there’s oil residue in the pan). The second batch usually cooks quicker because the pan is hotter, 2 ½ to 3 minutes on the first side, and 2 minutes on the second side.