Prep the Oven and Pan: Preheat your oven to 350°F (175°C). Line a loaf pan with foil or parchment paper and lightly spray the inside for easy removal.
Prepare the Salmon: Drain the canned salmon, then use a fork to flake it into small crumbles in a large mixing bowl.
Combine Dry Ingredients: To the flaked salmon, add the panko crumbs, parmesan cheese, green onions, yellow onion, dill, parsley, salt, and pepper. Mix thoroughly.
Add the Wet Ingredients: In a separate bowl, beat the eggs and milk until well combined. Pour this mixture over the salmon and mix again until evenly incorporated.
Form the Loaf: Pour the salmon mixture into the prepared loaf pan, pressing it down firmly with a spatula.
Bake: Bake for 45-55 minutes, or until the edges are golden brown. If the loaf is browning too quickly, cover with foil for the final 10 minutes of baking.
Serve: Let the salmon loaf cool for 10 minutes before slicing. Serve warm, ideally topped with your favorite sauce or fresh lemon juice.