French Onion Parmesan Chicken Sandwich

Preheat the oven to 450°F. Wash 3 medium potatoes and slice them into 1/8‑inch thick rounds, then toss them in a bowl with 1 tablespoon olive oil, salt, pepper, and 1 teaspoon garlic powder until evenly coated.

Pat the chicken breasts dry, then set them between two sheets of parchment or plastic wrap and gently pound any thick or uneven areas with a meat mallet, a rolling pin, or a small, heavy skillet to ensure even cooking. Lightly brush or spray each piece with olive oil, then season both sides with salt, pepper, and a teaspoon of garlic powder.

Place the chicken and potato slices on a baking sheet and bake for 20–25 minutes, or until the chicken is fully cooked and the potatoes are golden, turning everything halfway through for even browning.

Start the onions by slicing one very large onion (or two medium onions) into rings and placing them in a large, heavy skillet over medium heat with 1 tablespoon of olive oil. Cover and cook for 10–12 minutes, stirring occasionally, until the onions soften and turn translucent.

Once the onions are translucent and soft, remove the lid and continue cooking, stirring frequently. Add 1 tablespoon of butter to the skillet and let the onions cook down further, allowing them to caramelize into a deep golden color. Once they’re deep brown and caramelized, take them off the heat and set them aside.

Remove the onions from the pan, leaving behind any flavorful browned bits. Pour in 1/2 cup of half‑and‑half or heavy cream, whisk in 1/8 to 1/4 cup of freshly grated Parmesan cheese, and simmer gently until it slightly thickens and the mixture forms a smooth, creamy sauce—season with salt and pepper to taste.

Once the chicken is cooked, shred it into bite‑sized pieces and toss it with the warm, creamy sauce until fully coated.

Preheat the broiler, then cut the hoagie rolls horizontally down the middle and butter the cut sides so they toast evenly and develop a rich, golden finish. Serve with a generous amount of Parmesan chicken, caramelized onions, and seasoned potato slices for a hearty, comforting meal.

Enjoy!