Drizzle baguette slices with 2 1/2 tablespoons olive oil and bake until golden brown and crisp. Set aside.
Cover the salmon with the sliced lemon and steam until cooked through. Set aside.
In a small pan, heat the remaining olive oil over medium heat. Sweat the shallot until softened and translucent. Add the white wine and simmer until the pan is almost dry. Set aside.