Peel the cucumber in strips for a striped effect; cut in half lengthwise, scoop out the seeds with a spoon, and cut crosswise into ¼-inch thick slices. Combine the cucumbers, shallots, habanero, and mint in a bowl.
In a small bowl, combine the vinegar and salt. Gradually whisk in the olive oil. Pour over the cucumbers, toss gently to combine, marinate fo