Bring a large pot of salted water to a boil. Add the potatoes and boil until tender, about 20 minutes. Drain well then return the potatoes to the pot.

Add the remaining ingredients and mash the potatoes using a hand masher or mixer.

Place potatoes into a resealable container in the fridge for 1 hour to set.

Meanwhile, soak a cedar plank in water.

Fire up your smoker for indirect cooking.

When the potatoes have set, remove the plank from the water. Add the potatoes in a pile the full length of the plank.

Make small indentations in the top of the potatoes and add small spoonfuls of the Cajun butter.

Place plank onto the grill and grill 20 minutes or until the potatoes have turned golden brown and are heated through.

Serve hot.

Combine all ingredients.