1. Place tofu on several layers of heavy-duty paper towels. Cover tofu with additional paper towels; gently press out moisture. Cut tofu into 1-inch cubes.
2. Heat oil in a large nonstick skillet over medium-high heat. Add tofu; cook 5 to 6 minutes on each side or until golden on all sides, stirring occasionally.
3. Combine tofu, dressing, and next 5 ingredients in a large bowl; toss gently to coat. Divide lettuce evenly among 4 plates. Top lettuce with 1 3/4 cups tofu mixture. Sprinkle evenly with sunflower seed kernels.