Start by thinly slicing your silken tofu into small squares. Also cut your avocado in half. Thinly slice it crosswise so you get pieces similarly sized to the tofu slices. Arrange alternating slices of silken tofu and avocado on a serving platter.
In a small bowl, combine the minced garlic and ginger, soy sauce, sesame oil, sugar, vinegar, white pepper, water, and salt to taste. Mix well to combine, and drizzle over the tofu and avocado.