Whisk together egg, Old Bay & pepper in medium-size bowl. Add salmon and juice, onion & breadcrumbs or flour, whichever you choose to use. Stir to mix well. Or just dig in with your hands.
Shape into 3" cakes.
Place a large cast-iron or heavy-bottomed skillet over medium-high heat until hot then add oil. Once oil is hot spoon mixture into hot oil & cook 4 minutes or so on each side or until golden brown. Drain on paper towels.
Pretty plated up on fresh spinach leaves with lemon wedges on the side and tartar sauce in a pretty, glass small bowl, all in the same plate.