Chop the salmon fillet in large chunks and add them to a food processor with the cooked spinach (cooled and squeezed to remove as much water as possible), egg, parsley, garlic, and mustard.
Pulse a few times until the salmon and spinach are minced. Then add the salt, paprika, black pepper, and breadcrumbs.
Pulse a couple more times to mix all the ingredients, then remove the blades and with a tablespoon scoop the mince out and shape into patties with your hands.
In a large pan drizzle some olive oil, then cook the salmon cakes until they’re golden brown, flip and cook the other side as well.
Serve immediately with a fresh salad and garlic aioli or mayo on the side.
Notes
Cook the spinach (either fresh or frozen) in a pan with olive oil and season with salt and black pepper. Let it cool completely then squeeze out all the water before adding them to the food processor.