Crispy Duck Breast with Chipotle Orange Sauce

boneless Muscovy duck breasts or 4 (1/2-lb) Long Island (Pekin) duck breast halves - with skin

Kosher salt and freshly ground black pepper

[Sauce Ingredients]:

fresh orange juice

fresh lime juice

maple syrup*

finely chopped chipotle pepper in adobo sauce (or more if you like it really hot)

cinnamon stick

whole cloves

salt (celtic sea salt)

rendered duck fat (optional)