Spray grill or broiler rack with nonstick spray; prepare the grill or preheat the broiler.
MAKE THE DIPPING SAUCE:
In a medium-saucepan, bring the coconut milk, brown sugar, soy sauce, ketchup, peanut butter, fish sauce, and crushed red pepper to a boil. Cook, stirring occasionally, over medium-high heat until the flavors are blended and the mixture thickens slightly, about 5 minutes.
Remove from the heat; stir in the cilantro. Cover and keep warm.
ASSEMBLE THE PORK SKEWERS:
In a medium bowl, combine the pork, sesame oil, garlic, salt and pepper; toss to coat.
Thread the pork onto each of 12 (6-inch) metal or bamboo skewers, folding over each slice on to itself as you go. Grill or broil the pork 5 inches from the heat until cooked through, about 2 minutes on each side.,
Transfer the skewers to a platter; brush with some of the sauce. Serve the remaining sauce on the side.
Notes
If you opt for using bamboo skewers, be sure to soak the skewers in cold water at least 1 hour before using, so they will be less likely to burn during grilling.