Cook the potatoes in the skin in your own way. Preheat the oven to 230 ° C. Coat the bottom of a large baking dish with oil and sprinkle with salt and pepper. Check the salmon fillet for bones. Place it in the baking dish and spread it with olive oil.
Break the hard end of the asparagus and brush them on all sides with 1 tbsp olive oil.
Crush the boiled potatoes with a large knife and cut the lemon into 8. Mix the potatoes, the lemon wedges, the olives, the capers, 2 tbsp olive oil and pepper. Arrange them around the salmon, place the asparagus on top, sprinkle with 4 sprigs of thyme and slide in the oven for 15 minutes.
Meanwhile, make the sauce: mix the honey and mustard. Little by little, add the olive oil, while you beat the sauce with a whisk, just like a mayonnaise. Add 1 tbsp grated orange and the juice of half a orange.
Sprinkle the salmon with fresh thyme and add the sauce separately.