Combine the roasted red peppers, cream cheese, sour cream, soy sauce, sesame oil, garlic, ginger, rice vinegar, and gochujang (if using) in a blender or food processor. Blend until silky smooth.
1 cup roasted red peppers, 5 oz cream cheese, 3/8 cup sour cream, 1 tbsp soy sauce, 1 garlic clove, 1/2 tsp grated ginger, 1 tbsp rice vinegar, 1 tsp gochujang, 1/4 tsp sesame oil