If you have cornstarch on hand, use it; otherwise, try a little flour.
present and easily available; "the cash on hand is adequate for current needs"; "emergency police were on hand in case of trouble"; "a visible supply"; "visible resources"
[ 'on, 'än ] (preposition.) before 12th century. Middle English an, on, preposition & adverb, from Old English; akin to Old High German ana on, Greek ana up, on.