Corned Beef Casserole - With greens

2 cups uncooked elbow macaroni 2 cups diced corned beef , cooked 3 cups finely chopped cabbage 3 tablespoons butter 1/2 cup chopped onion 3 garlic cloves ,[...]

2 lbs red potatoes, boiled with their jackets on 1/4 cup all-purpose flour 2 large eggs 3/4 cup milk or 3/4 cup half-and-half 1 tablespoon Worcestershire[...]

8 ounces medium egg noodles 4 tablespoons butter , divided 1 cup chopped onion 2 1/2-3 cups diced corned beef , about 12 ounces 16 ounces frozen chopped[...]