Got leftovers? Don't toss 'em! Roll them over into this cheesy, crunchy mac 'n cheese with caramelized red onions + potato bun crumb topping.
To make the glaze, add the honey, mustard, vinegar, salt and pepper to a food processor or blender. Purée until smooth. Transfer to a bowl. Stir in rosemary and mix with spatula until incorporated.
To make the sandwich, in a large bowl, combine 1 cup of extra virgin olive oil, garlic, rosemary, salt and pepper. Add the chicken breasts, toss to coat. Cover and refrigerate for 1 hour.