4 (3/4 inch-thick) boneless pork chops, trimmed
1 clove garlic, minced
1/4 cup beef broth
1/4 cup soy sauce
2 tablespoons brown sugar
2 teaspoons vegetable oil
1/4 teaspoon red pepper flakes
2 teaspoons cornstarch
2 tablespoons water
Heat 1 tablespoon vegetable oil in a skillet over medium heat. Brown chops in hot oil, about 5 minutes per side; remove pork to a plate, reserving oil in skillet. Cook and stir garlic in reserved drippings until fragrant, about 1 minute. Whisk beef broth, soy sauce, brown sugar, 2 teaspoons vegetable oil, and red pepper flakes in a bowl, dissolving brown sugar. Return pork chops to skillet and pour soy sauce mixture over the chops. Bring sauce to a boil, cover skillet, and reduce heat to low. Simmer chops until tender, 30 to 35 minutes, turning once halfway through cooking. Transfer chops to a serving platter. Whisk cornstarch and water in a small bowl until smooth; stir into pan juices and simmer until thickened, about 5 minutes. Pour sauce over chops to serve.