We never could get my dads recipe for dressing and all 6 of us tried. There’s at least 6 varieties floating around here. Little of this little of that and poof he’d have it made.I had that problem with my mother-in-law. i would be in the kitchen any time I was there and she was cooking. That is how I got my husbands favorite recipes.
Give it a try when she makes the Scalloped Potatoes. After writing everything down find a quiet place and make some kind of order out of your notes. You may have to watch her again to completely round out the recipe.