1. Wrap the tofu block in a kitchen towel or paper towels for at least 1 hour to remove the moisture from the tofu. Or, use a tofu press. (This can be done a day in advance storing in the refrigerator.)
2. Bake the whole block of tofu in the oven or toaster oven until golden brown at 325 degrees for 25 minutes, flipping half-way through cooking.
3. Remove from oven. Cool and cut tofu into even cubes.

Make the Spicy Peanut Dressing:

1. Add the peanut butter, soy sauce, hot water, and sesame oil, cilantro, and Thai chili pepper to a blender and purée until smooth and creamy.

Assemble the Salad:

1. Place the tofu cubes and chopped cucumber in a large salad bowl. Gently toss with the spicy peanut dressing and chopped peanuts. Garnish the salad with sesame seeds and remaining cilantro. Serve with extra dressing on the side.