The actual meaning of the word casserole is "a kind of stewpan" in the Oxford English Dictionary. But when I think of it, I think of the fifties and the Leave it to Beaver family life. I also recall a famous tuna casserole from the seventies in Welcome Back Kotter. The point is it is a way to combine foods together to make life easier for the cooker of the household. And I have a recipe for your that I am quite sure was written in the fifties by a very old family friend.
Chicken and Rice Casserole.
2lb chicken breasts; s&p; 2T butter; 1/2c chopped onion; 1T chopped garlic; 1/3lb mushrooms; 1 Bay leaf; 1/2c dry white wine; 1/2c uncooked brown rice; 1c chicken broth. Brown chicken in butter and sprinkle with s&p. In casserole place the rice, wine and broth. Sprinkle onions, garlic, mushrooms and bay leaf. Add the chicken. Cover the casserole and cook for one hour at 350 or until rice is tender.
Make a vegetable and you are ready to eat!