01 -
Heat your oven to 375 degrees and lightly grease an 8x11 inch casserole dish. Line a baking sheet with parchment paper and set aside.
02 -
Cut the potatoes into small cubes and transfer them to the lined baking sheet. Drizzle with olive oil and toss to coat. Spread the potatoes out evenly on the sheet. Roast in the oven for 20 minutes, flipping them halfway through.
03 -
While the potatoes are roasting, cut the chicken into bite-sized pieces. Add them to a large mixing bowl and season with salt and pepper.
04 -
Chop the broccoli into small florets and add them to the bowl with the chicken. Mince the garlic and add that too.
05 -
Add the cooked potatoes to the bowl and stir everything together. Pour in the sour cream and mayonnaise and mix well to coat all the ingredients.
06 -
Spread the mixture into the prepared casserole dish. Sprinkle the shredded cheese evenly over the top. Place the dish in the oven and bake for 45 to 50 minutes, until the top is browned and bubbling and the chicken is cooked through.
07 -
Let the casserole rest for 5 minutes before serving. This helps everything set up nicely!