preheat oven to 350*

place potatoes in a saucepan with enough water to cover. bring to boil, cook until tender about 20mins, drain and mash with 1 teas of butter and enough milk to reach your desired craziness, continue masking or beat with electric mixer, until smooth, season with salt and pepper

in large skillet over med heat cook sausage until heated through, remove from pan and set aside, add remaining teas of butter to skillet and fry the onions over med heat until tender, mix gravy mix and water as directed on package and add to skillet with the onions, simmer, stirring constantly to form a thick gravy

pour half of the gravy into a square 8x8 casserole dish so that it coats the bottom, place sausages in a layer over the gravy( you may butterfly the sausages if you like) pour remaining gravy over the sausages then top with the mashed potatoes

bake uncovered for 20mins in preheated oven or until potatoes are evenly brown