Combine potato and bologna in a shallow 6 cup casserole dish.
Mix soup, milk, onion and sage and heat to boiling in medium saucepan.
Add peas and cook 1 minute; stir in cheese.
Remove from heat and pour over bologna and potatoes.
Bake at 375 F for 30 minute or until hot and bubbly.
(You may need to watch this one and stir during cooking-- the sauce could be too thin or thick depending on the type and brand of soup and kind of milk you use-- just keep an eye on it and use your best judgement!).