Kitchen twine or cocktail sticksfor closing the breasts
Instructions
Heat the oven to 190°C (375°F). Lightly grease the baking dish with butter.
Melt the butter in a large skillet over medium heat. Cook the onion and celery for 5 minutes until soft, then add the garlic, sage and thyme and cook for 1 minute.
Tip the bread cubes into a large bowl. Pour over the chicken stock, add the cooked vegetables and the beaten egg, and mix until the stuffing holds together. Season with salt and pepper.
Butterfly each chicken breast: slice horizontally almost all the way through, then open it flat like a book. Season inside and out with salt and pepper.
Spoon a generous quarter of the stuffing onto one half of each breast, fold it closed, and pin with cocktail sticks or tie with kitchen twine.
Place the stuffed breasts seam-side down in the baking dish and bake for 28–32 minutes, until the chicken reaches 74°C (165°F) in the thickest part and the top is golden.
Rest for 5 minutes, remove the sticks or twine, and slice. Serve with the pan juices, or portion into meal prep containers with your choice of sides.
Notes
Use day-old bread so the stuffing holds. Rest 5 minutes before slicing. Keeps 4 days refrigerated; freezes up to 2 months.