I know my mom came up with this casserole which is different than any other. She told me she threw together these ingredients one night when she had little else to pick from when my sister and I were small and the cupboards were pretty bare the day before payday. So that's what I started calling it..The day before payday Casserole! The combination of tomato soup and melted cheese reminds me of dipping my grilled cheese in tomato soup! Leftovers are especially yummy. In fact sometimes I think it's even better the second day.