Marinate the Chicken: In a medium bowl, mix ½ cup of honey, ¼ cup of soy sauce, 2 tablespoons of lemon juice, minced garlic, and 2 teaspoons of black pepper. Add the 4 chicken breasts to the bowl, ensuring they are well-coated in the marinade. Cover and refrigerate for at least 30 minutes, or up to 2 hours for maximum flavor.
Cook the Chicken: In a large skillet, melt 2 tablespoons of butter over medium heat. Remove the chicken from the marinade, letting the excess drip off, and place them in the skillet. Cook for 5-7 minutes on each side, or until the chicken is golden brown and cooked through, reaching an internal temperature of 165°F (75°C).
Prepare the Sauce: Once the chicken is cooked, pour the remaining marinade into the skillet. Allow it to simmer for 3-5 minutes, stirring occasionally, until the sauce thickens and coats the chicken. Remove from heat and let the chicken rest.
Cook the Macaroni: While the chicken is resting, bring a large pot of salted water to a boil. Add 2 cups of elbow macaroni and cook according to package instructions until al dente. Drain and set aside.
Make the Cheese Sauce: In the same pot, melt 2 tablespoons of butter over medium heat. Whisk in ¼ cup of flour and cook for 1-2 minutes, then gradually whisk in 2 cups of milk. Continue whisking until the mixture thickens, about 5-7 minutes.
Add the Cheese: Stir in 2 cups of shredded cheddar cheese and 1 teaspoon of mustard powder, mixing until the cheese is fully melted and the sauce is smooth. Season with salt to taste.
Combine: Fold the cooked macaroni into the cheese sauce until fully coated and creamy. Serve alongside the Honey Pepper Chicken, drizzling any extra sauce over the chicken for added flavor.