Grease a baking dish with oil. Put salmon in it. Salt the fillet, sprinkle with black pepper and dried thyme. In a bowl, mix two types of mustard, liquid honey and chopped garlic together.
Spread the mixture over the top and sides of the salmon. If you have time, you can cover the baking dish with cling film and leave to marinate for 15 minutes.
Place the salmon filled baking dish in the preheated oven. Bake at 340 F for 20-25 minutes. Or if you want a bit of crisp on the outside use 375F. for 12 -14 minutes or until it flakes easily with a fork. It is important not to over dry the salmon so that it does not lose its juiciness and tenderness.
To serve, carefully cut the salmon into pieces and serve with fresh thyme, green onions and vegetables on the side.