First, place the chicken tenders in a medium sized bowl. Pour enough buttermilk into the bowl to submerge the chicken. Add the soy sauce and dijon mustard. Stir thoroughly and let sit for 20 minutes. Meanwhile, in a shallow dish, combine the flour, Korean chili powder, salt, and pepper.
Heat the oil over medium high heat. When a chopstick dipped into the oil sizzles, you're ready to start frying.
Dredge each chicken tender in the flour mixture, coating thoroughly. Then dip the chicken tender back into the buttermilk. Dredge in the flour mixture a second time, and gently place into the hot oil. Fry until the chicken is golden brown. Remove to a cooling rack placed over a baking sheet.
Repeat the double-dipping/dredging and frying with the remaining pieces of chicken. When you're done frying the chicken, combine the gochujang, soy sauce, agave, sesame oil, and dijon mustard for the dipping sauce. Serve immediately--maybe alongside some French fries if you're having yourself an extra little splurge!