Name: Dump-and-Bake Chicken Tzatziki Casserole
Prep time: 15 min
Cook time: 40 min
Total time: 55 min
Yield: 6 servings
Cuisine: Mediterranean
Ingredients: 1.5 lbs boneless, skinless chicken breasts, cut into 1-inch cubes; 2 cups baby spinach leaves, packed; 1 medium red onion, thinly sliced; 1 cup grape tomatoes, halved; ¾ cup pitted Kalamata olives, sliced; 1 cup store-bought or homemade tzatziki sauce; ½ cup crumbled feta cheese; 1 tablespoon olive oil; 2 teaspoons dried oregano; ½ teaspoon garlic powder; ½ teaspoon salt; ¼ teaspoon black pepper; ½ cup shredded mozzarella cheese (optional, for topping); Fresh dill and lemon wedges, for serving (optional)

Hey y'all! If you're looking for a flavorful weeknight dinner that's a breeze to make, you're in for a treat with this Dump-and-Bake Chicken Tzatziki Casserole. It combines juicy chicken, tender veggies, and the cool, creamy freshness of tzatziki sauce—all baked together for a meal that's bursting with Greek-inspired flavor. Whether it’s for a quick family dinner, a potluck, or meal prep, this dish always delivers. Let's get cooking!

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Why You'll Love This

No need to pre-cook anything—just dump, bake, and enjoy!
Perfect combination of creamy, tangy flavors with minimal effort.
Healthy, balanced meal filled with protein and vibrant veggies.
Great for meal prep or feeding a crowd at gatherings.
Easy to adapt with your favorite vegetables or protein swaps.

Ingredients

1.5 lbs boneless, skinless chicken breasts, cut into 1-inch cubes
2 cups baby spinach leaves, packed
1 medium red onion, thinly sliced
1 cup grape tomatoes, halved
¾ cup pitted Kalamata olives, sliced
1 cup store-bought or homemade tzatziki sauce
½ cup crumbled feta cheese
1 tablespoon olive oil
2 teaspoons dried oregano
½ teaspoon garlic powder
½ teaspoon salt
¼ teaspoon black pepper
½ cup shredded mozzarella cheese (optional, for topping)
Fresh dill and lemon wedges, for serving (optional)

Directions

Step 1: Prep the Oven and Baking Dish

Preheat your oven to 375°F (190°C). Grease a 9x13-inch baking dish with a bit of olive oil or cooking spray.

Step 2: Layer the Ingredients

Scatter the cubed chicken breasts evenly across the bottom of the baking dish.
Top the chicken with spinach leaves, red onion slices, grape tomatoes, and sliced Kalamata olives.

Step 3: Mix the Sauce

In a medium bowl, whisk together the tzatziki sauce, olive oil, dried oregano, garlic powder, salt, and black pepper until blended.
Pour the tzatziki mixture evenly over the chicken and veggies, making sure everything is well coated.

Step 4: Add Cheese and Bake

Sprinkle the crumbled feta and mozzarella cheese (if using) evenly over the top.
Cover with aluminum foil and bake for 25 minutes. Then, remove the foil and bake for another 15-20 minutes, until the chicken is cooked through (internal temperature should reach 165°F/74°C) and the cheese is golden and bubbly.

Step 5: Serve

Remove from the oven and let rest for 5 minutes. Garnish with fresh dill and a squeeze of lemon juice before serving, if desired.

Notes

For a creamier casserole, add an extra ¼ cup of tzatziki sauce before baking.
If you prefer a less tangy flavor, reduce the amount of feta cheese.
Be sure to cut your chicken into even pieces for consistent cooking.

Variations

Veggie-Packed: Add chopped zucchini or bell peppers for extra veggies and color.
Low Carb: Swap out grape tomatoes for more leafy greens, or add riced cauliflower.
Different Protein: Use boneless, skinless chicken thighs, turkey, or even cooked chickpeas as a vegetarian option.

Required Equipment

9x13-inch baking dish
Mixing bowl
Whisk
Cutting board and knife
Aluminum foil

Storage Instructions

Store leftovers in an airtight container in the refrigerator for up to 3 days. To reheat, cover and warm in a 350°F (175°C) oven for 15-20 minutes, or microwave individual portions until heated through. This casserole is not recommended for freezing, as the tzatziki sauce may separate.

Suggested Pairings / Serving Recommendations

Serve over fluffy rice or herbed quinoa for a hearty meal.
Pair alongside a Greek salad and warm pita bread.
Finish with a chilled glass of crisp white wine, like Sauvignon Blanc.

Pro Tips

Use freshly squeezed lemon juice at the end for an extra pop of brightness.
Let the casserole rest before serving to allow the flavors to meld together.
Use homemade tzatziki for the freshest, zestiest flavor.

FAQ

Can I use frozen chicken breasts?: It’s best to use thawed chicken for even cooking, but you can use frozen if you increase the baking time and check doneness carefully.
What if I don't have tzatziki sauce?: Try making a quick tzatziki with Greek yogurt, grated cucumber, garlic, lemon juice, and dill.
Can I make this casserole ahead of time?: Yes! You can assemble the casserole (without baking), cover it in the fridge for up to 24 hours, and bake when ready to serve.

Prep Time: 10 minutes
Cook Time: 40-45 minutes
Total Time: 55 minutes