Theoretically, yes. Walnuts are the base of khoresht fesejan but if you don't want to use all walnuts, it's possible to use 1/3 lb almond meal and 2/3 lb ground walnuts. The process of making the recipe stays as it is. If you prefer to use whole almonds and ground them with the walnuts, make sure to use blanch almonds in order to have them mix with walnuts perfectly.