To prepare dressing: Combine peanut butter, soy sauce, vinegar, sesame oil, black bean-garlic sauce, ginger, chile-garlic sauce (or Sriracha), sugar, garlic and ground peppercorns in a medium bowl; whisk until well combined.
To prepare salad: Combine tofu, cucumber and ¾ cup cilantro in a large bowl. Add 2 tablespoons of the dressing; toss until well coated. Cover and refrigerate for 30 minutes.
To serve, transfer salad to a serving bowl. Drizzle with the remaining dressing. Top with peanuts, scallions and the remaining cilantro.
