I also have one of these roaster oven/buffet servers. I've never roasted anything in it but the buffet server option is great for heating up mashed potatoes and other things that you want to remain moist. Mine holds a lot of food. This is not the one I have but here is an example.

https://www.amazon.com/22-Pound-Roaster-Removable-18-Quart-Stainless/dp/B01N3NTXTU/ref=sr_1_1?crid=T7XOYRD07ZC7&keywords=electric+roaster+oven+with+buffet+server&qid=1566913122&s=gateway&sprefix=electric+roaster+oven+%2Caps%2C134&sr=8-1