Press the tofu between paper towels to remove excess moisture and crumble it into small bite-sized pieces.
In a small mixing bowl, whisk together the creamy peanut butter, tamari, rice vinegar, grated fresh ginger, minced garlic, lime juice, and water until the sauce is smooth and pourable.
Heat a large non-stick skillet over medium heat and add the crumbled tofu, sautéing for 5-6 minutes until the edges are slightly golden and firm.
Add the cooked green lentils and nutritional yeast to the skillet, stirring frequently for 3 minutes to heat through and allow the flavors to meld.
Pour half of the prepared peanut sauce into the skillet and toss the lentil and tofu mixture until every piece is evenly coated and the sauce has thickened slightly.
Prepare the lettuce cups by carefully washing and drying the butter lettuce leaves, ensuring they remain whole for filling.
Divide the warm lentil and tofu mixture equally among the four lettuce leaves.
Top each wrap with the finely diced red bell pepper, shredded carrots, sliced green onions, and a sprinkle of hemp hearts for added texture.
Drizzle the remaining peanut sauce over the top of the wraps and serve immediately while the filling is warm and the lettuce is crisp.