In a food processor or in a bowl using a hand grater, shred potatoes and onion.

In a large bowl, beat eggs. Add salt and matzah meal. Add the grated potatoes and onion.

In a separate bowl, combine mayonnaise, mustard, and duck sauce. Add diced meat and mix well.

In a frying pan, heat oil over medium-high heat. Place an overflowing tablespoon of potato batter into the frying pan. Place a tablespoon of the meat mixture above it. Then place another tablespoon of potato batter to cover the meat mixture. Fry until the bottom is browned (about four minutes). Flip over and fry until the other side is also browned. Repeat for the rest of the latkes.

Line a plate with paper towels. Remove latkes from frying pan and place on the plate to drain.