Went out to look at my decimated pot garden.
I don't use sweet peppers, just hot peppers, but all I do is cut into small pieces and freeze on a cookie sheet. Then I pop them in a freezer bag or seal them in the vacuum sealer. I like freezing on a cookie sheet so that they do not freeze together in one big lump.
My mom does use sweet peppers and that is always how she did it. No blanching!
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I have cut peppers into strips and frozen them in plastic containers.