Preheat the oven to 400 º Fahrenheit (200 º Celsius)
Cut off the fennel fronds from the bulb and put them aside. Slice the fennel bulbs into thin slices crosswise. Clean the carrots and slice them into bite-sized pieces. Do the same with the potatoes. Slice the leek into ½ inch slices. Give it a thorough bath in a tub of water and make sure all the dirt is removed. Drain the leeks in a colander. Put the vegetables on a cookie sheet and drizzle with olive oil, salt and pepper. Toss the veggies with the oil and the seasoning. Bake in the middle shelf of the oven for about 20 minutes.
Meanwhile, chop one of the fennel fronds and mix it with about 2 TBS of capers and finely chopped shallots.
When the vegetables are almost done, make a space for the salmon in the pan. Pour the vermouth and stock over the salmon. Add slices of butter on top of the salmon. Sprinkle the capers, fennel and frond mixture over the salmon. Top the fish with thinly cut lemon slices. Bake for about 15 minutes (or an internal temperature of 145° F). You want to undercook (not overcook) the salmon. Sprinkle the dish with parsley before serving.
