Cut the onion into 4 pieces. Clean and cut the leeks into 3 or 4 inch long pieces. Grind the Onion and Leeks in a food processor until a nice pulp.
Wrap the leek-onion mixture in paper towels to drain.
Heat 1” of Oil in a skillet on Medium heat.
Beat Eggs, Kosher Salt, Black Pepper. Add the leek-onion mixture and the Matzo Meal. Mix until evenly distributed.
Fry the latkes. Scoop ¼ of mix per latke into the oil. For mini latkes, scoop 1 Tablespoon of mix per latke. Fry until browned on the bottom and edges, then flip and finish frying until evenly browned on both sides.
Serve hot. Great plain or you can serve with Sour Cream, salsa, ranch or nearly any sauce.