Add pork chops to slow cooker. In a small bowl, combine teriyaki sauce, rice vinegar, red pepper flakes, and garlic. Slowly pour over pork chops. Cover and cook for 6 hours on low.
Remove pork chops and chop into smaller bite-sized pieces. Strain sauce with a pasta strainer into a medium saucepan.
In a small bowl combine cornstarch and water then slowly pour into saucepan. Bring sauce to a bowl over high heat, stirring constantly while boiling for two minutes. Add peanut butter, stirring well, then add pork, stirring until sauce covers pork.
Serve portions of rice, topping with Thai pork & sauce mixture, then topping that with the green onions and peanuts.