Edamame Soup - With legumes

1 teaspoon olive oil 1 medium onion , finely chopped 1 potato , peeled and cut into small cubes 750 g frozen shelled edamame , defrosted 1 quart vegetable[...]

1 teaspoon olive oil 1 red onion , medium 1 golden potato , medium 24 ounces frozen edamame 1 quart vegetable broth 2 tablespoons sour cream , watered down[...]

6 cups chicken broth or 6 cups vegetable broth 2 cups shelled edamame beans (fresh cooked or frozen, thawed) 1 cup finely sliced white mushroom 1 teaspoon[...]