Step 1In a small bowl, combine the shallots and the vinegar, and set aside to steep for at least 5 minutes while you're preparing the rest of the ingredients.
Step 2Combine the chicken and the cantaloupe in a serving bowl, and set aside until ready to serve.
Step 3When ready to serve, whisk the oil into the vinegar mixture to make a smooth emulsion. Season with a pinch of salt.
Step 4Add the arugula to the chicken and cantaloupe. Pour dressing over the mixture and stir gently to ensure that everything is evenly coated. Finish with a good grinding of freshly ground black pepper to taste.