Preparation of Chicken: Begin by meticulously trimming any excess fat from the chicken pieces and ensuring they are thoroughly cleansed. Set aside.
Flour Mixture: In a mixing bowl or resealable plastic bag, combine all ingredients for the seasoned flour. Reserve this mixture for later use. Proceed to season the chicken liberally with seasoned salt, onion powder, garlic powder, black pepper, paprika, and poultry seasoning.
Searing Process: Pour vegetable oil into a heavy cast-iron skillet or a large frying pan and heat over medium-high. Dredge the chicken pieces in the seasoned flour, ensuring excess flour is shaken off. Fry the chicken in batches to golden brown perfection on both sides, taking care not to overcrowd the pan. Once seared, transfer the chicken to a sheet tray and set aside.
Gravy Preparation: Dispose of the oil used for frying. In the same skillet, melt butter over medium heat. Add the sliced onions and sauté until they are halfway cooked, approximately 3 to 4 minutes. Add the minced garlic and continue cooking for another minute. Stir in 3 tablespoons of the reserved seasoned flour until fully incorporated, reducing heat to medium.
Gravy Thickening: Gradually whisk in the chicken stock or broth to ensure the mixture remains lump-free. Introduce the half & half and allow the mixture to simmer gently for 3 minutes, adjusting seasoning as necessary.
Final Cooking: Return the chicken pieces to the pan, coating them well with the gravy. Cover and let simmer on medium-low to medium heat for 30 to 35 minutes, or until the chicken is completely cooked through. Baste the chicken periodically with the gravy to enhance flavor and moisture.
Serving: Once the chicken is tender and the gravy has thickened, serve the dish hot. This preparation pairs exceptionally well with rice or mashed potatoes, which complement the rich, savory gravy.