Today at the Greenmarkets: Jam On!

From 10-1 today at the GAP Greenmarket, Laena McCarthy of Anarchy in a Jar will be demonstrating how to make creative combinations with locally grown fruit and put up the summer harvest. She’ll also be signing copies of her new book, Jam On: The Craft of Canning Fruit. Tomato season is in full swing with varieties of every size, shape and color to choose from. You can find some things to do with them here. Don’t forget to bring your textiles and compost for recycling.

At the Park Slope Farmer’s Market, not only vegetables, fruits, and herbs are in season, so are all kinds of yummy baked goods, seafood, wines and ciders, and specialty foods. Sunday 11-5.