Looking for a specific sweet potato recipe

[lynxstch]

Hi all..and TIA for anyone's help...2 years ago my sister in law made a sweet potato 'casserole' type thing, that my husband loved (can't stand them myself..lol)...it was sweet potatoes, maple syrup, some kind of marshmallow..and it was all mixed together..more like a souffle than a potato dish..anyone have anything like this?..would like to make it for Thanksgiving and surprise him...I tried searching, but came up with nothing..and my sister in law is in HA visiting with her first granddaughter..Meghan Grace, who was born 2 weeks ago!..again, thanks if anyone can help..

 

[lewdyan1]

Giving this a bump in case someone can help!