In a heavy pot, add oil and onions and cook over medium heat until caramelized.
Add red peppers, garlic, salt and black pepper. Cook for about 2 minutes.
Add chicken stock, vinegar and honey and BRING to a boil.
Add kale to liquid. Cook for about 5 minutes or until tender. Remove pot from heat and drain remaining liquid. Add cream cheese and red pepper flakes and stir.
Butterfly pork tenderloin cutting a slit down the middle. Do not cut through the pork. Cover the pork with plastic wrap; pound with the flat side of a meat mallet until about 1/2 inch thick, starting from the middle and working outward. Discard plastic wrap.
Spread the kale mixture over the tenderloin and tightly roll. Secure the seams with toothpicks.
Place pork in a baking dish and brush liberally with barbecue sauce.
Bake in a 350 oven for 25-30 minutes or until internal temperature has reached 145 degrees. Let pork rest for 3 minutes.
290 calories; 6 g fat; 1 g saturated fat; 65 mg cholesterol; 330 mg sodium; 34 g carbohydrate; 4 g fiber; 26 g protein