Cut each chicken thigh into 9-12 bite-size pieces. Toss chicken in gochujang marinade to coat. Chill at least 4 hours and up to 24. Preheat a grill to high heat. Thread chicken onto skewers.
Dice the chicken breast into small pieces ... Add the chopped tomatoes, the tomato puree, and the gochujang. Stir well and cook until the tomatoes have softened, about five to six minutes.
Gochujang (1350 Euclid Ave ... An order of uber-crispy, panko-breaded Korean fried chicken ($7.50) arrives with a choice of sauces and the customary chicken-mu, or pickled radish cubes.