Place sliced potatoes in a large bowl of cold water and allow to sit for about 20 minutes. Drain the water and soak potatoes again in more clean water for another 15 minutes. Drain potatoes completely and allow to dry thoroughly on paper towels.
Using a large Dutch oven or other large, heavy pot, heat Canna-oil to 350 degrees. Carefully lower potatoes into hot oil with a slotted spoon or spider. Do not over-crowd the pot, you will likely need to cook them in batches. Fry potatoes until lightly browned, about 5 minutes. Remove final batch of potatoes from oil and again, place in a single layer on clean paper towels to cool completely with other fried batches.
Meanwhile, heat gravy in a small saucepot until hot. Set to side until ready to use. Or prepare your own Canna-gravy by combining and melting 1/4 cup Canna-butter in a small skillet. Slowly whisk in 1/4 cup Wondra flour and cook for about 1-3 minutes. Slowly whisk in 1-2 cups low-sodium beef broth and continue cooking on simmer until thick and rich. Season to taste with salt and pepper.
Reheat oil in Dutch oven or heavy saucepot to 425 degrees. For the second time, add potatoes to pot, again in batches if necessary, cooking until they are golden brown, about 5-7 more minutes. Turn off heat and remove potatoes from oil, again placing in a single layer on clean paper towels then immediately season with salt, pepper and choice of other seasonings.