When you picture Benjamin Franklin, what do you see? A lovable mad scientist flying a kite in the rain, perhaps, or a shrewd political strategist haggling at the Constitutional Convention in Philadelphia. Maybe you imagine Franklin schmoozing with the French, brokering deals, or hurriedly setting type in the offices of the Pennsylvania Gazette. What you likely do not envision is Franklin the gardening whiz and gourmet, writing excitedly from London on the subject of a mysterious Chinese “cheese” called “tau-fu.”