"This easy casserole — full of ground beef, roasted broccoli, and topped with hash browns — was inspired by the classic Minnesota Tater Tot hotdish. Roasting the broccoli before adding it to the casserole gives the whole dish a much more complex and exciting flavor, but it's by no means necessary. If you want to keep it simple, skip roasting the broccoli (Step 2) and use 6 cups frozen broccoli, thawed, in its place (omit 1 tablespoon oil, as well)...."