- Preheat oven to 250°C.
- Combine sauce ingredients to make gratin sauce. Set aside.
- Season salmon fillet with salt and pepper. Sear salmon in a pan until medium cooked in the middle.
- Brush a thick layer of gratin sauce on salmon, lightly sprinkle breadcrumb over the top, and bake in oven for 10 mins or until the top becomes golden brown.