Whisk 2 tablespoons creamy peanut butter, 2 tablespoons Asian chile-garlic paste, 1 tablespoon plus 1 ½ teaspoons soy sauce, 1 tablespoon plus 1 ½ teaspoons lime juice, 3 minced garlic cloves, and 1 teaspoon red pepper flakes if using together in a large bowl. The dressing will be on the thicker side.
Add 2 sliced medium English cucumbers, ½ cup coarsely chopped fresh cilantro, and ½ cup coarsely chopped salted, roasted peanuts. Toss together with a flexible spatula until all the cucumbers are evenly coated with the sauce. Garnish with red pepper flakes if desired. This salad is best eaten immediately.
