Prepare directly in the glass. Place the lime zest and ginger slices in the glass. Pour in 3/4 parts of Cognac. Lightly press the lime and ginger 2 to 3 times using a pestle. Half fill the glass with ice. Stir well for 5 seconds using a bar spoon. Pour in 3/4 parts of Cognac. Add lemon-lime soda and the cucumber peel. Stir well for 5 seconds using bar spoon.