1-Getting started with this chicken pot pie casserole is straightforward and fun, even for beginners. Begin by preheating your oven to 375°F, as outlined in the recipe summary, to set the stage for a bubbly, golden finish. This step ensures everything bakes evenly, locking in those comforting flavors.

2-First, prepare your vegetables: dice 1 medium yellow onion, cut 3 medium carrots and 3 medium celery stalks into half-inch pieces, and mince 2 cloves garlic. These fresh elements form the foundation of the savory filling, adding texture and nutrition. Chopping them ahead makes the process smooth and keeps things organized in your kitchen.

3-Next, sauté the vegetables in unsalted butter (amount not specified) along with thyme, kosher salt, and freshly ground black pepper until they’re softened and lightly browned. This step builds depth in the dish, drawing out natural sweetness from the carrots and celery. Stir in all-purpose flour (amount not specified) and the minced garlic to create a roux that thickens the sauce perfectly.

4-Gradually add low-sodium chicken broth (amount not specified) and whole or 2% milk (amount not specified) to the mix, stirring constantly to avoid lumps. Bring it to a boil, then simmer until it thickens into a creamy gravy that coats the ingredients nicely. After that, mix in 1 pound of shredded or diced cooked boneless chicken and frozen peas (amount not specified), seasoning to taste for a balanced flavor.

5-Spread the mixture into a baking dish and top with separated refrigerated biscuits. Bake for 20 to 30 minutes until the biscuits turn golden and the filling bubbles. Don’t forget to rotate the dish if needed and cover with foil to prevent over-browning, finishing with a brush of melted butter (amount not specified) for extra flavor.

6-For those adapting the recipe, remember the substitutions mentioned earlier, like using plant-based options for vegan versions. This guide keeps things simple yet detailed, helping you master chicken pot pie casserole with ease.