3 leek apple casserole Recipes

rutabaga or a yellow turnip, about 2-1/4 lb, trimmed, peeled, cut in chunks, purple-topped turnips, trimmed, peeled, cut in chunks, sweet potato, peeled, cut in chunks, carrots, peeled, cut in chunks, sauce : (or use ready made bechamel), unsalted butter, big leeks (only the white part ), flour, milk, apple cider, good melting cheese ,cheddar or gruyere, cut in chunks, grated fresh parmesan

sausages, smoked bacon (i use back bacon but streaky would also work), carrot, button mushrooms, leek, green apple, cider (regular fizzy stuff from a can is fine), pork bouillon cube (i use knorr), boiling water, plain flour (optional)