In a medium sized bowl combine pineapple juice, vinegar, red pepper flakes, tomato paste,and sugar. Make sure your sugar is totally dissolved. Set aside.
Wash and cut slices into the side of each pork chop with the fat and silver skin along the edge. This stops the pork chops from curling. Make cuts every 1 ½ to 2 inches along that edge. The cuts should be no more than ½ an inch deep.
Dry pork chops with paper towels and sprinkle both sides with salt and pepper.
Heat about 2 tablespoons of oil in a large skillet over medium-high heat until shimmering or a drop of water flicked in it dances.
Add pork chops and cook until well browned and cooked, between 5 and 8 minutes per side. Your pork chops should be 145 degrees.
If pork chops are thinner than 1 inch reduce your cooking time.
Remove pork chops from your skillet and place on a plate and cover or tent loosely with tinfoil.
Add tomato mixture to pan and simmer, until thickened or reduced, about 5 minutes.
Return pork chops to your skillet to coat in tomato mixture. Use extra sauce for serving. Serve with rice. Enjoy!