Place the well-drained zucchini and potatoes, flour, salt, and 1 large or 2 small eggs in a large mixing bowl.
Mix everything really well together until you get a uniform batter with the flour and egg distributed evenly throughout the vegetables. I find that a large wooden spoon or a spatula works best fot this purpose.
Heat a thin layer of coconut oil on the frying pan until hot. You do need some oil or the fritters will stick, but 1/4 inch thick layer is usually enough. I find that putting too much oil at once can result in greasy fritters.
Place four dollops of the batter onto the hot pan and flatten with the back of your spoon. Smaller fritters are easier to flip so I usually use a tablespoon of batter per fritter. Fry the fritters on medium high heat for a few minutes until they crisp up well and turn golden.
Then flip the fritters onto the other side and fry for another few minutes.
Once cooked on both sides, transfer the fritters onto a warm plate lined with some paper towels or a cheeesecloth.
Serve immediately with some salsa and a dollop of sour cream.