Freeze peas without blanching by first cleaning them of strings and stems, then cutting them into 1- to 2-inch pieces. The next steps are placing them into a freezer bag and extracting as much air from the bag as you can.
The real trick is to get as much air as possible out of the bag before putting it in the freezer. A vacuum-type sealer works best, but it is still possible to extract air without one. Open a small portion of the bag, insert a straw and suck out as much air as possible. When done, seal it back up quickly, and freeze.