Combine vinegar, hoisin, soy sauce, sesame oil and crushed red pepper in a small bowl; set aside.
β
Press the tofu between paper towels to squeeze out as much liquid as possible. Cut the tofu into cubes. Heat canola oil in a large nonstick pan over medium-high heat. Brown every side of the tofu - careful not to burn them. Stir in garlic, ginger and scallions. Add the reserved sauce; cook, stirring, until well combined and heated through, about 2 minutes.
β
Spoon some of the tofu mixture into each lettuce leaf. Top with radish, if desired.
β
Enjoy!