I freeze bell peppers all the time. When I find that I can't use it all before they go bad, I dice them, throw it in a strainer to drain a little bit and then throw it in a ziploc bag. Freeze. When I need to use it for spaghetti sauce, I just whack the bag on the counter and loosen some of it, and then dump what I need out in a bowl. Sometimes I let it defrost in the bowl or dump it directly into the sauce frozen. Not a big deal. I also dice green onions and put it in the ziploc bags, too. I don't bother laying it out on a cookie sheet first in either pepper or onions. More trouble for me. LOL