Preheat the oven to 350°F.

1. Brown the salmon in a pan (stainless steel, as it will go in the oven) with the butter nut for 1 minute on each side.

2. In a bowl, mix together the olive oil, vinegar, chopped tarragon, salt, and pepper.

3. In a food processor, crumb the bread coarsely and add it to the previous mixture, soak everything well and place it on the fish fillet.

4. Put everything in the oven to finish cooking for 8 to 10 minutes.

5. Serve the salmon on a bed of shoots, accompanied by a warm sauce or vinaigrette.