Gardeners sometimes eat beans at the shell stage, which is after the beans have fully formed in the pods, but before they have hardened. Just about anything you can cook with dry beans, you can cook with shell beans--but faster. You won't find them in the market often, since they don't keep well, so they are mostly a gardeners' secret.
You could eat any common garden bean variety at this stage, but several are sold specifically for it. They often have these splashy red pods. This one is a bush bean called 'Taylor's Horticultural'. Sometimes you find a similar one called 'Tongue of Fire.' At the shell stage, the beans are white or white streaked with red. When they become dry beans, they are bown streaked with maroon, and are often called cranberry beans.
So, in any case, I planted these in July in San Francsisco and harvested them at the shell stage in the second half of October and early November. I grew about 10 cups of beans (out of the pods) in a bed about 6 by 3 or 4 feet. And then I experimented with cooking them. They were great as Boston baked beans, fine in a French soup with pistou, and made yummy succotash.
And here is the succotash I made, with some of the beans and an open pod. The recipes I used were from The Victory Garden Cookbook, Marian Morash, Alfred Knopf, 1982. I modified the succotash recipe to make it vegan so I could take it to a class potluck. The recipe, as modified: 2 cups of shell beans, 2 tablespoons of chopped onion, 1 cup chopped tomato (from a can), 2 cups corn kernels (from frozen), 2 tablespoons Smart Balance margarine, a bit of salt and pepper. Put beans and chopped onions in a saucepan and add a cup of water. Bring water to a boil, cover, and simmer 20 minutes. Stir in tomatoes and corn. Simmer for 10 minutes longer. Stir in margarine, salt and pepper to taste. (4-6 servings).
The original recipe suggested using a mixture of lima and shell beans, since the original native American dish was more likely to use limas, but limas don't do so well in cool SF, so I just cut to the chase and used all shell beans. Got me thinking about succotash, which I for some reason thought was a Native American dish from the Southeastern part of the continent. But when I looked it up, I found that it was a dish of the Nanaganset, of what is now Rhode Island, who spoke Algonquian. The word, in Algonquian, was m'sickquatash, and meant "corn not crushed or ground." So there you have it.
What was in the original succotash? Not bacon, which was in the recipe I used before I modified it, though maybe other meat. And I read that the tomatoes suggest a Dutch influence, since they were known to add tomatoes and other vegetables to succotash.
Final analysis: great crop; good eating. Worth doing again next year.