Prepare the Salmon: Place the salmon fillet in a large bowl and use a fork to flake it into small pieces. Remove any bones if present.
Mix Ingredients: Add the breadcrumbs, red onion, dill, lemon juice, and lemon zest to the bowl with the salmon. Mix until combined.
Add Binder: Gently fold in the beaten egg and season the mixture with salt and pepper to taste. The mixture should hold together; if it's too dry, add a little more lemon juice.
Form Patties: With your hands, form the mixture into patties about 2 inches in diameter. You should get about 6-8 salmon cakes, depending on the size.
Cook the Cakes: Heat olive oil in a skillet over medium heat. Once hot, place the salmon cakes in the skillet, flattening them slightly with a spatula. Cook for 4-5 minutes on each side or until golden brown and crispy.
Finish and Serve: Once cooked, remove the salmon cakes from the skillet and place them on a paper towel-lined plate to absorb excess oil. Serve hot with tartar sauce or lemon aioli on the side.
Notes
Serve with tartar sauce or lemon aioli for added flavor.