Squash is a good source of potassium. Beans are a good source of potassium. Avocado is high in potassium. Kiwis are packed with potassium, an essential mineral that helps the body maintain proper levels of hydration and electrolytes.
Step 2. Boil 1 to 1 1/2 qt. of water in a large pot. When the water has reached a rolling boil, dump the escarole for 2 minutes, stirring once or twice as the stems soften. Lift the escarole out with a slotted spoon onto a plate and transfer to the colander where you may leave it to drain for up to an hour.
Wash lentils, and drain well. Place the water in a large saucepan over high heat, and bring to a boil. Add the lentils, and stir once or twice. Turn off the heat, cover, and let sit for 30 minutes. Place the oil in a large pot over medium heat. Add the onion and celery, and sautÃ© until softened, about 3 minutes.