Wash the salmon, dab dry and cut into 4 pieces. Wash and chop the thyme. Wash lemon, grate peel, squeeze juice. Peel garlic, press through a garlic press.
Peel the shallots and cut into fine rings. Cut olives into rings as well. Clean, wash and drain the lamb's lettuce well. Heat 1 tablespoon of olive oil. Fry the salmon fillets on each side for about 2 minutes.
Season with salt, peppercorns, thyme and lemon peel. Fry over medium heat for 2 minutes. Mix lemon juice and 3 tablespoons of olive oil. Add olive and shallots rings. Arrange lamb's lettuce and salmon in portions.
Drizzle with the olive marinade. Add 1 slice of baguette each. Serve garnished with lemon.