Add the tempeh pieces and the Italian dressing to a bowl, making sure all of the pieces are covered. Cover and place in the fridge for at least 30 minutes.
While the tempeh is marinating, prepare the croutons. Preheat the oven to 350 degrees and line a baking sheet with parchment paper.
Combine the bread, olive oil and garlic salt in a bowl. Toss to combine.
Spread the bread evenly on the baking sheet and place in the oven for 20 minutes - tossing halfway.
Prepare the dressing by combining the tahini, lemon juice, apple cider vinegar, olive oil, garlic, salt & pepper in a bowl or mason jar. Stir to combine, adding water until desired consistency is reached.
To cook the tempeh, heat a pan on the stove over medium heat. Spray with non-stick spray and use tongs to place the tempeh in the pan (allowing the marinade to drip off).**
Cook until the tempeh is browned on both sides (approx. 3-5 minutes per side). Remove from the pan and assemble the salad.
Add the romaine to a large bowl and drizzle with dressing. Toss until the lettuce is coated. Top the salad with croutons, avocado and the tempeh. Serve with additional black pepper and any leftover dressing.