Pick through the salmon and remove any bones. In a mixing bowl, beat the eggs and add the diced onion, salmon and pepper. Mix thoroughly.
Shape into 2 ounce patties; 8 patties. In a large skillet over medium heat, heat the oil. Fry each patty for 5 minutes on each side or until crispy and golden brown.
In a small bowl mix dressing: lemon juice and olive oil; season with salt and pepper. Toss mixed greens and chopped lettuce with dressing