Genius - Freeze lemon and lime slices with water in muffin tins to make large ice cubes for pitchers of water.
Freeze herbs while they are fresh - put chopped herbs into ice tray and add olive oil before freezing. Then put into freezer bags and label for later use.
How to Preserve various kinds of Food for Future Consumption Using Three Simple Old Fashioned Methods
recipe for sriracha style hot sauce (my husbands favorite)
Homemade Hot Sauce from Illustrated Bites - My hot sauce addicted friends will be very happy about this.