Steps
1. In a skillet, melt the butter over medium heat.
2. Add the diced chicken breast and season with salt and pepper. Cook until the chicken is fully cooked, about 6-8 minutes.
3. In a bowl, whisk the egg and then pour it into the skillet with the chicken. Stir gently to scramble the eggs until cooked, about 2-3 minutes.
4. Add the ketchup to the skillet and mix well until everything is combined and heated through.
5. Spoon the chicken and egg mixture onto a large lettuce leaf, wrap it up, and enjoy!