01 -
Preheat the oven to 375°F (190°C) and lightly grease an 8 x 11-inch casserole dish. Line a baking sheet with parchment paper and set aside.
02 -
Cut the potatoes into small cubes and place them on the lined baking sheet. Drizzle with olive oil, toss to coat, and spread evenly. Roast in the oven for 20 minutes, flipping halfway through.
03 -
Cut the chicken breasts into bite-sized pieces and place them in a large mixing bowl. Season with salt and pepper. Chop the broccoli into small florets and add them to the bowl.
04 -
Add the minced garlic, cooked potatoes, sour cream, and mayonnaise to the mixing bowl. Stir until all ingredients are well coated.
05 -
Spread the mixture evenly into the prepared casserole dish and sprinkle shredded cheese on top. Place the dish in the oven and bake for 45-50 minutes until the top is browned and bubbling, and the chicken is cooked through.
06 -
Allow the casserole to rest for 5 minutes before serving.