INCOMING TRANSMISSION on KickStarter now!
Magic Meeple...the boardgame people! MagicMeepleGames.com
You MUST use all ingredients on your table (unless you have a shelf). You MAY use any ingredients from your hand.
So there's typically no need to table them unless you aren't transmuting this turn and want to save ingredients for a future turn.
This is correct, the table concept was added to mitigate the frustration of being unable to draw the cards you needed all at once. So you may add things to your table as you see fit according to the limitations, and you may add anything additional directly from your hand at the time of transmutation, but you must use and be able to use everything that is on your table at that moment you choose to activate the transmutation attempt.
I hope this clears that up!