It’s peak corn, tomato, and stone fruit season, and Martha’s recipes will help you make the most of it.Credit: Bryan GardnerAs a cook and gardener, Martha finds summer inspiring. The vegetable garden at her farm in Bedford, N.Y., yields a bounty of tomatoes, corn, cucumbers, and other seasonal produce. In her kitchen, she uses them for salads, sides, desserts, and more. But her summer cooking isn’t all vegetables. She’s also inspired by the boun…