What would be the best size roaster oven to make Texas Trash (some call it Chex Mix) in? I don't like cooking it in the "regular" oven, and prefer a roaster oven (not slow cooker). But I'm not familiar with them and would like some opinions on what size to get. My mom has the 18 qt roaster oven and when I'm there, I use hers to make the mix, but it's pretty big and I'm thinking I could get away with a smaller one. I live alone, so I won't be using it much except for the trash mix, but don't mind spending the money since I make that particular snack a lot for me and for my daughter's family.