If possible, these are typically made with slightly coarser semolina - it's still relatively fine but just has a little more texture than semolina flour. If not available, semolina flour will also work. I find the coarser semolina is a little heavier compared to volume measurement so used 190g semolina, whereas a cup of semolina flour is nearer 170g. Both should be fine, you just end up slightly more or less time thickening the mixture they are close enough.