Dump and Bake Pesto Chicken Orzo Casserole
Dump and bake pesto chicken orzo casserole turns simple pantry pasta, chicken, pesto, tomatoes, spinach, and cheese into a creamy one-dish dinner with almost no prep.
Why You Will Love This Recipe
- Rich basil flavor: Pesto melts into the broth and coats every piece of tender orzo.
- Creamy texture: The pasta bakes right in the dish, so the starch thickens the sauce naturally.
- Easy cleanup: No boiling pasta and no extra pan for the chicken.
- Balanced comfort: Chicken adds protein, tomatoes bring juicy sweetness, and spinach adds color and nutrients.
Budget and Health Tip: Use chicken thighs if they cost less at your store. They stay juicy in the oven and taste great with pesto. You can also use homemade pesto made with spinach, basil, garlic, parmesan, and sunflower seeds instead of pine nuts to save money.
Ingredients (Serves 4)
- 1 1/2 cups dry orzo (300 g)
- 1 pound boneless skinless chicken breast or thighs, diced into bite-sized pieces (450 g)
- 1/2 cup basil pesto (120 g)
- 2 cups cherry tomatoes, halved (300 g)
- 3 large garlic cloves, minced
- 2 3/4 cups low-sodium chicken broth (650 ml)
- 3 cups fresh spinach, lightly packed (90 g)
- 1 cup shredded mozzarella (115 g)
- 1/4 cup grated parmesan (25 g)
- 1/2 teaspoon fine salt (3 g)
- 1/4 teaspoon black pepper (1 g)
Step-by-Step Instructions
1. Heat the Oven
Preheat the oven to 375°F (190°C). Use a 9 by 13 inch baking dish, or a similar 3 quart casserole dish. A roomy dish helps the orzo cook evenly.
2. Mix the Base
Add the uncooked orzo, diced chicken, pesto, cherry tomatoes, garlic, salt, pepper, and chicken broth to the baking dish. Stir until the pesto loosens into the broth and the orzo sits mostly under the liquid. The mixture should smell fresh, garlicky, and full of basil.
3. Cover and Bake
Cover the dish tightly with foil. Bake for 25 minutes, until the broth bubbles around the edges and the orzo starts to soften. The chicken should look opaque, and the tomatoes should begin to collapse and release their juices.
4. Stir in the Spinach
Remove the foil carefully because hot steam will escape. Stir the casserole well, scraping the corners so no orzo sticks. Fold in the spinach while the dish is hot. It will wilt quickly and turn glossy green.
5. Add the Cheese
Sprinkle the mozzarella and parmesan evenly over the top. Return the dish to the oven uncovered for 8 to 12 minutes, until the cheese melts and the edges look creamy and lightly golden.
6. Rest Before Serving
Let the casserole rest for 5 minutes before scooping. The sauce will thicken as it sits, and the orzo will become tender and creamy instead of loose and soupy. Check that the chicken reaches 165°F (74°C) in the thickest pieces.
Expert Troubleshooting and FAQs
Can I use cooked chicken?
Yes. Stir-cooked chicken into the dish with the spinach after the first bake. Since it only needs to warm through, this keeps it tender instead of dry.
Why is my orzo still firm?
The dish may need more time, or the foil may not have sealed tightly. Add 1/4 cup warm broth (60 ml), cover again, and bake for 5 to 8 more minutes until the orzo tastes tender.
Why is the casserole too watery?
Let it rest for 5 to 10 minutes. Orzo keeps absorbing liquid after baking. If it still looks loose, bake uncovered for a few more minutes until the edges bubble and thicken.
Can I use rice instead of orzo?
Not for this exact method. Rice needs a different liquid amount and bake time. Orzo cooks faster and gives this casserole its creamy pasta texture.
Can I make it ahead?
You can dice the chicken, halve the tomatoes, mince the garlic, and measure the pesto ahead. For the best texture, mix the orzo with the broth right before baking so it does not soften too early.
Estimated Nutritional Facts
Per serving, based on 4 servings:
- Calories: about 640
- Protein: about 45 g
- Carbs: about 58 g
- Fats: about 27 g
Dump and Bake Pesto Chicken Orzo Casserole
Ingredients
- 1 1/2 cups dry orzo (300 g)
- 1 pound boneless skinless chicken breast or thighs, diced into bite-sized pieces (450 g)
- 1/2 cup basil pesto (120 g)
- 2 cups cherry tomatoes, halved (300 g)
- 3 large garlic cloves, minced
- 2 3/4 cups low-sodium chicken broth (650 ml)
- 3 cups fresh spinach, lightly packed (90 g)
- 1 cup shredded mozzarella (115 g)
- 1/4 cup grated parmesan (25 g)
- 1/2 teaspoon fine salt (3 g)
- 1/4 teaspoon black pepper (1 g)
Instructions
- 1. Heat the Oven. Preheat the oven to 375°F (190°C). Use a 9 by 13 inch baking dish, or a similar 3 quart casserole dish. A roomy dish helps the orzo cook evenly.
- 2. Mix the Base. Add the uncooked orzo, diced chicken, pesto, cherry tomatoes, garlic, salt, pepper, and chicken broth to the baking dish. Stir until the pesto loosens into the broth and the orzo sits mostly under the liquid. The mixture should smell fresh, garlicky, and full of basil.
- 3. Cover and Bake. Cover the dish tightly with foil. Bake for 25 minutes, until the broth bubbles around the edges and the orzo starts to soften. The chicken should look opaque, and the tomatoes should begin to collapse and release their juices.
- 4. Stir in the Spinach. Remove the foil carefully because hot steam will escape. Stir the casserole well, scraping the corners so no orzo sticks. Fold in the spinach while the dish is hot. It will wilt quickly and turn glossy green.
- 5. Add the Cheese. Sprinkle the mozzarella and parmesan evenly over the top. Return the dish to the oven uncovered for 8 to 12 minutes, until the cheese melts and the edges look creamy and lightly golden.
- 6. Rest Before Serving. Let the casserole rest for 5 minutes before scooping. The sauce will thicken as it sits, and the orzo will become tender and creamy instead of loose and soupy. Check that the chicken reaches 165°F (74°C) in the thickest pieces.
