In a bowl, combine: Flaked salmon, Mashed potatoes, Egg, 1/2 cup breadcrumbs/crushed crackers, Celery + carrot, Poultry seasoning (or sage/thyme),Dijon, lemon zest, lemon juice and Salt and pepper.
3 Mix until cohesive but not paste-y. It should hold together when squeezed; if too wet, add more crumbs; if too dry, add a spoon of milk or extra mashed potato.
Form & coat:
4 Scoop ~¼ cup at a time, shape into patties about ½–¾ inch thick.
5 Press each patty into extra breadcrumbs to coat both sides lightly.
Chill (if you have time):
6 15–20 minutes in the fridge helps them stay tidy in the pan. If not, just handle gently.
Pan-fry:
7 Heat a thin layer of oil in a skillet over medium to medium-high.
8 Fry cakes 3–4 minutes per side, until deep golden and crisp.
9 Keep warm on a rack or paper towel-lined tray in a low oven (~200°F) while you finish the batch.