If you don't have time to let your peas rehydrate overnight, you can use the quick-soak method, which will take just a little over an hour. Add the peas to a medium-sized saucepan over medium-high heat. Cover with water and bring to a rapid boil. Continue boiling the peas for two more minutes. Remove the pan from the heat, cover it, and let sit for at least an hour. Add more water as necessary to make sure your peas are covered with at least an inch of water.  Drain and rinse with fresh water.