Warm olive oil and 1 tablespoon butter in a large skillet until the butter is foaming. Add the corn kernels and saute until tender, about 3 minutes.
Transfer 1 cup of the corn to a blender. Add the buttermilk, whole milk, soybean paste, garlic and remaining tablespoon butter. Puree on high until a smooth chowder-like puree is formed. (If the puree is still chunky, add a few tablespoons water.)
Add the corn puree, lima beans, edamame, black-eyed peas and red peppers to the skillet and continue to saute, stirring often, until everything comes together and the peppers begin to soften, another 3 to 5 minutes.
Season with salt and pepper. Fold in the chopped herbs and serve immediately.