In Recipe View, when picking ingredients with the "Add" buttons, there is a check-box to "Only show in-stock items" down at the bottom.
This helps reduce the clutter and limits you to what you use (assuming you have it onhand), but keeps everything in the Inventory Master list for later use if needed. This is esp. helpful if you load the additional Maltsters items such as Dingemans, Briess, Weyermann, etc. b/c the inventory then has so many equivalent items.