Step 1: Preheat the Oven - Preheat your oven to 350°F. Giving the oven time to come fully to temperature matters here because the rice needs steady heat from the beginning in order to absorb the liquid properly. While the oven heats, grab an oven safe skillet with a lid. If your skillet does not have a lid, aluminum foil works just fine for covering it tightly during baking.
Step 2: Build the Rice Base - Pour the French onion soup and beef consomme into the skillet, then add the long grain rice. Stir everything together until the rice is evenly distributed through the liquid. Try not to leave a big mound of rice in one area because you want every grain to have a fair chance at soaking up that savory broth as it cooks.
Step 3: Add the Butter - Arrange the sliced butter over the rice mixture. You do not need to stir it in. As the skillet heats, the butter will melt down into the soup and rice, adding richness throughout the bottom of the pan. This is one of those simple steps that makes the finished rice taste much more comforting.
Step 4: Season the Chicken - In a small bowl, combine the garlic powder, pepper, and salt. Sprinkle the seasoning over both sides of each chicken piece, then arrange the chicken over the rice mixture. Give the pieces a little room if your skillet allows it. Setting the chicken on top keeps it from disappearing into the rice while still allowing all those savory juices to mingle as everything cooks.
Step 5: Make the Creamy Onion Topping - Mix the sour cream and dry onion soup mix together in a small bowl until evenly combined. Spread some of the mixture over the top of each chicken piece. I like to take a moment here and cover the chicken fairly evenly because that creamy layer helps protect the surface from drying out while giving you a concentrated hit of onion flavor in every serving.
Step 6: Add the Croutons and Cheese - Sprinkle half of the slightly crushed croutons over the chicken. Place one slice of provolone over each portion, cutting the cheese in half if necessary so it fits neatly over the chicken. Sprinkle the remaining croutons over the cheese. Keeping some croutons above the cheese gives you those toasted crunchy bits that make the final texture especially good.
Step 7: Cover and Bake - Cover the skillet tightly with its lid or aluminum foil and place it in the preheated oven. Bake for 1 hour. During this time, the rice absorbs the soup and consomme, the butter melts through the skillet, and the chicken cooks gently above everything. Resist the temptation to keep opening the oven because trapped steam helps the rice cook properly.
Step 8: Broil the Topping - Carefully remove the lid or foil once the baking time is finished. Switch the oven to broil and return the uncovered skillet to the oven for a few minutes. Stay close during this part. Broilers work quickly, and you are looking for melted, lightly browned cheese and toasted croutons rather than anything dark or burned.
Step 9: Garnish and Serve - Remove the skillet from the oven and sprinkle fresh parsley over the top if you are using it. I usually give the skillet a few minutes to settle before serving because everything is incredibly hot straight from the oven. Spoon some rice onto each plate and place a piece of cheesy chicken over the top, making sure everybody gets plenty of those crunchy crouton bits.