For cakes: in a skillet over medium heat, add 1 tablespoon of olive oil and sauté celery, onions and bell peppers until tender 5-6 minutes. Stir in the parsley. Transfer the mixture in a large bowl and add the salmon, cracker or bread crumbs, mayonnaise, Dijon, salt, pepper, egg and lemon zest and juice. Mix well with hands, shape into patties. 1 can yields 4 patties. Place on baking sheet and refrigerate for 20 minutes.
In large nonstick skillet heat 1 tablespoon olive oil over medium heat. Cook until golden brown 3-4 minutes per side.