The best replacement for casserole is dutch oven.

The best alternatives to casserole are rated as following:
★★★★★  dutch oven
★★★★★  hot dish
★★  cassoulet
★★  stew
★★  hotdish
★★  corn pudding
★★  saucepan
★★  lasagna
★  quiche
★  gratin
★  souffle
★  stock pot
★  slow cooker
★  pie
★  saute pan
  bread pudding
  dressing
  corn souffle
  strata
  stewing beef
  frittata

Your alternative for casserole is not listed? Suggest!
Speaking about casserole, one probably shouldn't forget about hash browns.

Other search terms related to casserole and their ratings are:
★★★★★ hash browns
★★★ cream of chicken soup
★★ cooked chicken
You have in mind a companion for casserole and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of casserole in all years. Click on graph for more.
casserole
dutch oven
hot dish