"The fundamental principles of a Paleo lifestyle are pretty simple," says Pete Evans. "Take out of your diet all grains and legumes, refined sugar and dairy, and celebrate fats and proteins from animals from land or sea that have had a natural diet. The Paleo way also embraces organic fruit, veg, nuts and seeds (no chemicals or pesticides). Now, that makes a lot of sense to me as proteins and fats are essential for the body and the macro and micronutrients of fruit and veg are astounding. This is a Paleo version of a shepherd's pie; you can play around with different proteins and I would suggest using either sweet potato or cauliflower as your crust on top instead of potatoes, as they're very starchy."
Note Duck fat, lard, tallow or coconut oil are all good fats that are Paleo-friendly; use whichever you prefer.