Make Chicken Tzatziki Casserole Recipe: seared chicken over rice, topped with tzatziki and melted mozzarella for a fresh, comforting bake.
For Tzatziki Sauce (if making homemade):
Preheat the oven to 375°F (190°C) so it's ready when the assembled casserole is finished—this simple, first action sets the stage for the gentle bake that will finish the chicken and melt the cheese into a bubbly, golden top.
Lightly grease a rectangular baking dish with olive oil, coating the base and sides with a thin film so the rice and cheese won't stick; use a pastry brush or paper towel and keep the dish nearby on the work surface.
Pat the boneless, skinless chicken breasts dry and rub them with olive oil, then sprinkle garlic powder, salt and freshly cracked black pepper so each breast is evenly seasoned and glossy with oil.
In a skillet (not shown later), brown the chicken breasts briefly until the surface is caramelized and golden but the interior is still undercooked—this quick browning adds Maillard color and texture to the final bake.
Spread the cooked rice evenly in the greased rectangular baking dish so it forms a uniform, slightly compacted golden bed that will cradle the chicken and soak up juices during baking.
Nestle the browned chicken breasts on top of the rice in the rectangular dish, spacing them evenly so each piece sits partially on the rice and shows the caramelized, seared surfaces.
Spoon the tzatziki sauce over the chicken, spreading it into a thin, even coating across the breasts; the chilled, creamy yogurt-cucumber texture contrasts with the warm, seared chicken and will mellow slightly under the heat.
Evenly sprinkle shredded mozzarella across the top so the cheese blankets the chicken and tzatziki; the casserole is now assembled and ready to go into the oven to finish cooking and achieve a melted, bubbly surface.

Bake the casserole uncovered for about 25–30 minutes, until the chicken is fully cooked through, the rice is warmed, and the mozzarella on top is melted, bubbling and developing small golden-brown spots.
Remove the dish from the oven, let it rest briefly so juices settle, then sprinkle chopped fresh parsley over the top for a bright herbaceous finish; serve warm, with lemon wedges or pita if desired.
Combine Greek yogurt, finely diced cucumber, minced garlic, lemon juice and chopped fresh dill in a small bowl; stir until smooth and aromatic, tasting and seasoning with salt and pepper to balance the acidity and garlic.
Adjust seasoning to taste, then refrigerate the tzatziki for at least 30 minutes to let the flavors meld and the cucumber soften slightly—this chilled, creamy sauce can be used in the assembly or spooned alongside the finished casserole.
When serving, present the rectangular baking dish on the warm white painted pine surface, spoon additional tzatziki at the table if you like and garnish with parsley and lemon wedges for bright contrast and fresh texture.
