In a large mixing bowl, add the chicken, yogurt, lemon juice, oil, hot pepper or tomato paste, and seasonings. Give mixture a good mix to combine, cover the bowl and refrigerate for 1 to 2 hours or overnight. When ready to cook the chicken, remove from the fridge and let come to room temperature for 30 minutes.
Preheat the oven 425F. Generously coat a large baking sheet or pan with the melted butter (or oil). Evenly spread the chicken in the pan and bake for 15 minutes. Remove the pan from the oven and use kitchen thongs or a spatula to turn the chicken in the pan. If chicken looks to be drying out before it is cooked through, pour over 1/4 to 1/2 cup of water and mix. Return the pan to the oven and bake chicken for an additional 10 to 15 minutes or until thoroughly cooked through. For a charred finish, switch oven to broil setting and broil the chicken for 3 to 5 minutes or until toasted to your liking. Remove pan from oven and set aside.
As the chicken cooks, make the oil coating. In a small mixing bowl, add the oil, hot pepper or tomato paste, paprika, cayenne pepper and salt. Whisk to combine and set aside.