Bay seniors interested in locating truly local foods should consider traveling no farther than their own kitchen. Why not, for example, create your own ricotta, the soft, creamy Italian cheese that sweetens hundreds of recipes? This Friday at Cooking with Rosetta there will be a class demonstrating how to make your ricotta as well as incorporating it into recipes for cannelloni, frittatas, stuffed zucchini and mousse. 6:30pm at Paulding and Company in Emeryville. $95.