A ledger line or leger line is used in Western musical notation to notate pitches above or below the lines and spaces of the regular musical staff. A line slightly longer than the note head is drawn parallel to the staff, above or below, spaced at the same distance as the lines within the staff.
this is more of an opinion type of thing but i think when its soft enough to bite into (but obviously with a little bite because nobody likes mooshy pasta) and when it's not too hard to put a fork through