cheese Dip (ask mom what it's really called!)

I'm putting this in for mom...its her recipe and she made it in Mammoth. We all liked it. So I made it for Enrichment the other night and all the girls there loved it! Thanks mom! 

2 cups Swiss cheese (grated)

2 cups Mayonnaise

1 sweet onion chopped 

Mix it all up, put in 9x9 pan cook at 350 for 45 minutes. Serve with pita chips.