1Prepare the brine by slicing the orange, lemon, and leek, and combine with herbs, peppercorns, garlic, bay leaves, salt, sugar, and water in a large container.
2Submerge the chicken in the brine.
3Melt butter in a pan, add sliced leeks, salt, pepper, and minced garlic, sautéing until soft.
4Stir in flour, followed by heavy cream, and simmer until thickened to create a sauce.
5Layer sliced sweet potatoes and the leek sauce in a baking dish.
6In a bowl, mix softened butter with oregano, paprika, garlic powder, onion powder, salt, and pepper.
7Remove the chicken from the brine, pat it dry, and coat it thoroughly with the prepared compound butter.
8Place the seasoned chicken in the air fryer and roast.