Need Recipe For Oat Crisp Topping With Shortening As Ingredient

But not any recipe!
I once had a recipe for an oat crisp topping I used on apple or peach crisp. The recipe contained shortening as an ingredient along with oats, sugar and cinnamon. It made a large batch and might have been a food service/school cafeteria recipe. Does anyone have something like this! It could me mixed and stored for a period of time and pulled out when ready to use. Sure would like to have it again!