Place the broccoli in a saucepan with enough water to cover. Bring to a boil, and cook 5 minutes, or until tender. Drain.
Place the cooked broccoli in a 9 inch pie plate. Top with the chicken. In a bowl, mix the soup and milk, and pour over the chicken. Sprinkle with Cheddar cheese. Mix the melted butter with the bread crumbs, and sprinkle over the cheese.
Bake in the preheated oven for 15 minutes, or until bubbly and lightly brown.