Step One Casserole

Step 1 -Preheat the oven to 375 degrees F.

Step 2 -Lightly spray a 9x13-inch casserole dish with cooking spray.

Step 3 -Bring a large pot of salted water to a boil and cook the noodles to al dente, according to the package directions.

Step 4 -While the noodles are cooking, in a large skillet, heat the oil.

Step 5 -Add the garlic to the oil and cook until golden, about 1 minute.

Step 6 -Add the broccoli and the salt to the oil, sauté, cover, and cook over medium heat until the broccoli begins to soften, about 4-5 minutes.

Step 7 -In a large pot over medium-low heat, melt the butter.

Step 8 -Add the shallots to the melted butter and cook until soft, about 2-3 minutes.

Step 9 -Add the flour and the salt to the shallots and cook for 2-3 minutes.

Step 10 -Slowly whisk the chicken broth into the shallot mixture until well combined, about 30 seconds.

Step 11 -Add the milk to the broth mixture and bring to a boil.

Step 12 -Lower the heat to medium and simmer the milk mixture, stirring occasionally, until it has thickened, about 6-7 minutes.

Step 13 -Transfer the milk mixture away from the heat and add the cheddar cheese and 1 tablespoon of the parmesan cheese. Mix well until the cheese has melted.

Step 14 -Add the chicken, the cooked noodles, and the cooked broccoli mixture to the cheese mixture and mix well until evenly coated.

Step 15 -Pour the casserole mixture into the prepared casserole dish.

Step 16 -Sprinkle the casserole with the breadcrumbs and the remaining parmesan cheese.

Step 17 -Lightly spray more of the cooking spray on top of the casserole and bake until heated through, about 20-25 minutes.

Step 18 -Place the casserole in the broiler until the breadcrumbs are browned and crisp, about 1 minute.

Step 19 -Serve.