This French Onion Chicken Noodle Casserole is filled with delicious noodles smothered in a creamy French onion sauce. It's easy to make with leftover or rotisserie chicken and your favorite onion dip!
113 oz. roll Wewalka Puff pastryfound in the refrigerator section
1egg + 1 splash cold water - Optional
Instructions
Prep Work:
Preheat oven to 400 degrees.
Slice the onions ¼ inch thick and set aside. A mandoline slicer makes this quick and easy.
Shred the mozzarella and set aside. Low moisture mozzarella shredded from a block melts the best.
Cook the Chicken. (Shortcut: Use 2 leftover cooked chicken or rotisserie chicken.)
Butterfly the chicken and cut the seam to create two thinner pieces of equal size. Pat dry and season with Italian seasoning, salt, and pepper.
Heat the oil in a large pot or dutch oven over medium-high heat. Sear the chicken on each side for 4-5 minutes, until light golden brown. The bottom of the chicken will release from the pan once searing is complete.
Carefully remove the chicken and leave 1 tablespoon of oil in the pot. Let the chicken rest for 5-8 minutes prior to cutting into bite-sized cubes.
Caramelize the Onions
Reduce heat to medium and melt the butter. Add the onion slices and toss to coat.
Partially cover and stir occasionally. Reduce heat if they begin to cook too quickly.
Allow them to reduce significantly over the course of 40 minutes, they will eventually turn a caramel color and begin to foam. (See post above for visual.)
Add the thyme towards during the last few minutes of cooking.
Cook the Pasta
Add the chicken broth, beef broth, and water to the pot. Bring to a gently boil and add the pasta.
Let the pasta gently boil uncovered for about 7 minutes, until no more than al dente. Stir occasionally.
Assemble the Casserole
Remove from heat. Add the onion dip, cream of chicken soup, mozzarella cheese, and cubed chicken. Stir to combine.
Transfer to a lightly greased 9 x 13 casserole dish.
Remove the puff pastry from the fridge and gently unroll. Place it over the casserole dish and use a paring knife to remove excess dough around the edges.
Optional: Combine the egg + a splash of cold water, whisk to combine and brush a very light coating over the top of the pastry.
Bake at 400 degrees for 20 minutes. Remove from the oven and serve!
Notes
Onion Dip: I prefer to combine 1 cup soup cream with 2 Tablespoons of Lipton French Onion Soup and Dip Mix, but you may also use 1 cup of your favorite onion dip.For saucier pasta, use ¾ lb. instead of a full pound.