The best way we have found to freeze any type of peas or green beans is to bring water to a rolling boil, put peas or beans in the water and blanch for 1 to 2 minutes.  Be careful not to over blanch.  You will notice the peas or beans turning a deeper green. Remove pot from heat and drain hot water off peas in a colander.  Plunge peas or beans into ICE water.  Be sure to have plenty of ice in the water as the hot peas will melt it.  The ice water stops the cooking process.  This process should keep the peas or beans nice and firm.  Place in plastic freezer bags, or freezer containers and freeze immediately. If you find that the peas or beans are not firm when you thaw them out, you blanched them to long or did not cool them quick enough. Byron