1 (14.75 ounce) can salmon, drained and flaked
3/4 cup rolled oats
1/2 onion, sliced
1/2 lemon, juiced
1 tablespoon Dijon mustard
salt and ground black pepper to taste
1 teaspoon vegetable oil
Mix salmon, oats, onion, egg, lemon juice, mustard, salt, and black pepper in a bowl until evenly combined. Divide and shape mixture into four patties.
Heat vegetable oil in a large skillet over medium-high heat; pan-fry salmon patties until heated through, about 7 minutes on each side.