daddy's squash casserole

this is another recipe to get rid of all that squash! Dad made this one up a few years ago since he cant seem to stop planting so much of it. I don't even plant it anymore! My kids love this and there are never any leftovers!
1 yellow squash sliced thin
1/2 onion chopped
1 bell pepper
1 roll sausage
2 cups shredded potatoes
1 cup cheese (any kind)
1 egg
boil squash and mash set aside, cook sausage onion and bell pepper in skillet in a casserole dish mix squash, sausage mixture, potatoes, cheese and egg cook at 350 for about 45 minutes and enjoy!