Sesame Tofu Salad

Name: Sesame Tofu Salad
Ingredients: 1/4 cup low-sodium soy sauce; 1/4 cup rice wine vinegar, plus more if needed; 2 tablespoons minced fresh ginger; 2 tablespoons brown sugar, plus more if needed; 3/4 teaspoon toasted sesame oil; Pinch red pepper flakes; 2 cloves garlic, minced; 2/3 cup plus 2 tablespoons olive oil; One 14-ounce package extra-firm tofu, cut into cubes; 2 tablespoons sesame seeds; One 10-ounce package mixed greens; 1 cup red grape tomatoes, halved; 1/2 red onion, very thinly sliced; One 11-ounce can mandarin oranges, drained