How to Make Your Own Preserves Share Print Canning and pickling are back in a big way, and it's easier than you think! If you know how to boil water, you can stock away sweet, juicy, peak-season produce in a few simple steps. Prev Next 10/18 Step 5 Fill the jars. Ladle in the cooked fruit or veggies using a wide-mouth funnel, leaving the headspace -- the room at the top of the jar, which allows food to expand and a vacuum to form -- called for in your recipe. Get our best 30-minute dinner ideas now!