01 -
Preheat oven to 350°F. Grease a 9x13 inch baking dish. Set aside.
02 -
Heat olive oil in a large skillet over medium-high heat. Add chicken cubes and season with salt and ¼ teaspoon pepper. Cook, stirring occasionally, until chicken is golden brown and cooked through, about 8-10 minutes. Set aside.
03 -
Thaw the frozen broccoli according to package instructions. Drain well, patting dry with paper towels to remove excess moisture.
04 -
In a large bowl, mix together cream of chicken soup, mayonnaise, sour cream, cheddar cheese, milk, lemon juice, garlic powder, onion powder, and remaining ¼ teaspoon pepper.
05 -
Fold the cooked chicken and thawed, drained broccoli into the sauce mixture.
06 -
Spread the chicken and broccoli mixture evenly in the prepared baking dish.
07 -
In a small bowl, combine breadcrumbs and melted butter. Sprinkle the breadcrumb mixture evenly over the top of the casserole.
08 -
Bake for 30 minutes, or until the top is golden brown and the casserole is bubbling around the edges. Let stand for 5 minutes before serving.