Cook the bacon in a skillet over medium-low heat until crispy.
Remove the bacon from the pan. Discard the excess grease, reserving 2 to 4 tablespoons of the bacon drippings in the skillet.
While the bacon is cooking, slice each chicken breast in half lengthwise to create two thinner slices. Cover the slices with plastic wrap and use a meat tenderizer to pound them to approximately 3/4 inches thick.
Combine the flour, breadcrumbs, seasoned salt, and black pepper in a shallow dish. Dredge the chicken through the mixture, coating both sides.
Add vegetable oil to the reserved bacon drippings in the skillet. Use just enough to cover the chicken halfway.
Heat over medium-high heat. Once hot, fry the chicken in the oil/grease in batches, cooking for 4-5 minutes per side until it achieves a golden sear. Set aside on a plate.
Remove the excess oil from the pan, leaving behind the brown remnants or "fond" for added flavor. (Remove any blacked bits.)
Melt the butter in the skillet over medium heat and use a wooden spoon to scrape/clean the bottom of the pan. Gradually sprinkle in the flour, whisking continuously until it thickens.
Gradually add the chicken broth, whisking constantly to avoid lumps. Stir in the half and half.
Slowly incorporate the soy sauce, onion powder, garlic powder, thyme, rosemary, and sage into the mixture.
Bring to a gentle boil, then reduce to a simmer.
Return the chicken to the pan. Sprinkle the bacon on top of the chicken.
Cover partially and cook over low heat for 10-15 minutes, ensuring the internal temperature of the chicken reaches 165 degrees before serving.
Garnish with parsley and serve with mashed potatoes if desired.