Preheat oven to 425°F.
In a casserole dish, toss together the chicken, olive oil or butter, garlic, jalapeño, smoked paprika, cumin, cilantro, and parsley - season with salt and pepper. If time allows, marinate 1 hour or overnight in the fridge.
Bake for 30 minutes, until the chicken is cooked through and begins to crisp.
To make the sauce, combine all ingredients in a food processor or blender. Season to taste with salt.
Serve the chicken over bowls of rice with creamy sauce, mango, and avocado chunks. Enjoy!
