preheat oven to 450°F. Wash and pat dry whole chicken. Place in a large oven safe skillet
Combine the oil and spices in a small dish. With a brush or your hands, cover the entire chicken with the seasoning oil.
Place in the oven for 45 minutes or until chicken is at 165°F internal temperature. (If using a chicken not spatchcocked, cook at 400F for about 1 hour)
Meanwhile, add the egg and avocado oil to a wide mouthed jar and blend, using an immersion blender on low, until the oil turns into a creamy emulsion (about 15 seconds). Move the blender up and down until it turns into a mayo-like texture.
Next add the jalapeño, white vinegar, salt, pepper, garlic, cilantro and lime juice and blend again until smooth.
Once the chicken is fully cooked, remove from the oven and serve with a side salad, oven baked potato and the tangy green sauce.