Cook potatoes in boiling water until fork-tender. Drain and coarsely chop or mash. Preheat oven to 350°F. Crumble and cook sausage in medium skillet until browned. Drain and transfer to large bowl. Stir in potatoes, milk, green onions, Worcestershire sauce, salt and pepper. Pour into greased 2-1/2- or 3-quart casserole dish. Sprinkle with bread crumbs; drizzle with melted butter. Sprinkle with paprika. Bake, uncovered, 30 to 35 minutes or until casserole bubbles and top is browned. Refrigerate leftovers.