Cut the salmon fillet into large chunks and place in a food processor. Pulse for a few seconds until its broken into a chunky mince. Remove the salmon from the processor and place in a bowl.
Add to the salmon mince the lemon zest, juice, chopped chives, parsley, red onion, eggs, almond flour, salt and pepper. Using your hands mush everything together until well blended.
Divide the mixture into 7 balls and flatten until they are approximately 1 to 1 1/2 inches thick, don't flatten them too much or they will fall apart when cooked.
The patties can be cooked for 4 minutes per side in a frying pan with approximately 1 tsp of oil or on a well oiled grill. Flip when they are golden and crisp in colour.
To serve the burgers place on a lettuce leaf and top with a slice of onion, tomato and a spoonful of tartar sauce.