Preheat oven to 400 degrees F. Lightly oil a baking sheet or coat with nonstick spray.
Season chicken with oregano, paprika, salt and pepper, to taste; set aside.
Place sausage and potatoes in a single layer onto the prepared baking sheet. Stir in olive oil, garlic and lemon zest; season with salt and pepper, to taste. Top with chicken in a single layer.
Place into oven and roast until the chicken is completely cooked through, reaching an internal temperature of 165 degrees F, about 25-30 minutes.* Then broil for 2-3 minutes, or until caramelized and slightly charred.
Serve immediately, garnished with cilantro, if desired.
Notes
*Cooking time will vary depending on the size and thickness of the potatoes.