Slow Cooker Cajun Pot Roast with Maque Choux Throwing Cajun seasoning on a roast does not a Cajun Pot Roast Make! You want to make this thing Cajun, mince up Garlic, Onions, Celery, Bell Peppers, Cajun Seasoning (or just salt pepper and a small amount of cayenne) and stuff the roast. By stuffing, make small pockets with a knife and fill the pockets with the veggie/seasoning mix. Now you have a "CAJUN" Pot Roast! If you really want it to be good, toss in a pack of onion soup mix in the beginning and add rough chopped potatoes and carrots after about 6-7 hours of the 10 hour cycle. That's Cajun at its best!