
2 strips bacon, cooked until crispy, crumbled, bacon fat reserved
1/4 cup chopped onion
1 egg
1/2 cup mayonnaise
2 teaspoons Dijon mustard
1/2 teaspoon sugar
1/2 lemon, zested
400g tinned salmon, checked for large bones
1 baked or boiled russet potato, peeled, and fluffed with a fork
1/4 cup bread crumbs
2 tablespoons grated Parmesan
Freshly ground black pepper
1/2 cup vegetable oil