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Hearty Chicken, Quinoa & Veggie Freezer Casserole

A comforting and robust casserole made with shredded chicken, nutty quinoa, and mixed veggies, perfect for busy days with a newborn.
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Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Servings: 6 servings
Course: Casserole, Main Course
Cuisine: American
Calories: 390
Ingredients Method Notes

Ingredients
  

Main Ingredients
  • 2 cups cooked shredded rotisserie chicken about 1 large breast and 1 thigh; perfect for using leftovers
  • 1.5 cups cooked quinoa measured cooked — about 1/2 cup dry
  • 1.5 cups frozen mixed vegetables (peas, carrots, corn) no need to thaw
  • 1 medium yellow onion, finely chopped about 1 cup; sweat it for sweetness
  • 2 cloves garlic, minced adjust if your household loves garlic
  • 2 tablespoons olive oil or butter for sautéing
  • 3 tablespoons all-purpose flour for thickening; substitute cornstarch 2 tbsp if gluten-free
  • 1.5 cups low-sodium chicken broth adds flavor without being salty
  • 3/4 cup milk or unsweetened almond milk for dairy-free
  • 1/2 cup plain Greek yogurt or sour cream for creaminess and tang
  • 1 teaspoon dried thyme or 1 tablespoon fresh, chopped
  • 1/2 teaspoon dried rosemary, crushed optional — adds warmth
  • 1 cup shredded sharp cheddar or a melty cheese blend; reserve 1/4 cup for topping
  • 1/2 cup grated Parmesan optional, for depth
  • to taste Salt and freshly ground black pepper
  • 1/2 cup breadcrumbs or panko optional topping for a crunchy finish
  • 2 tablespoons chopped fresh parsley for finishing brightness

Method
 

Preparation
  1. Preheat your oven to 375°F (190°C) if you plan to bake now; if freezing, no oven needed yet.
  2. In a large skillet, warm 2 tablespoons olive oil or butter over medium heat until shimmering.
  3. Add the chopped onion and a pinch of salt. Sauté for 5–7 minutes until soft and slightly caramelized.
  4. Stir in the minced garlic and cook 30 seconds more until fragrant.
Make the Main Filling
  1. Sprinkle the flour over the onions and garlic, stirring constantly for 1 minute to cook out the raw flour taste.
  2. Gradually whisk in the chicken broth and milk, bringing the mixture to a gentle simmer.
  3. Remove from heat and stir in the Greek yogurt, thyme, rosemary, shredded cheddar, and Parmesan until smooth. Season with salt and black pepper to taste.
  4. Fold in the cooked quinoa, shredded chicken, and frozen mixed veggies.
Assemble and Chill/Bake
  1. Pour the mixture into a 9×13-inch baking dish or divide into individual freezer-safe containers.
  2. Sprinkle the reserved 1/4 cup cheddar and breadcrumbs evenly across the top.
  3. For freezing now: cover tightly with plastic wrap and foil; label with the date.
  4. To bake immediately: remove plastic wrap, bake uncovered at 375°F (190°C) for 25–30 minutes until bubbly and golden.

Notes

Cool before freezing to prevent ice crystals. Label clearly with reheating instructions.