in a bowl mix together ketchup, mustard, molasses, vinegar, cajun seasoning, worcestershire sauce, thyme, onion and garlic. scrape into large freezer bag, add chops, seal and turn to coat. refrigerate for 4 hours.
Make Ahead: freeze for up to 1 month, thaw in refrigerator for 24 hours.
in skillet bring chops with marinate and 1/2 cup water to boil, reduce heat heat to low, cover and simmer until fall apart tender, about 40 minutes. remove chops with slotted spoon to serving platter, increase heat to med-high and cook until liquid reduces to about 1 cup, about 8 minutes.