Step 2 - Flash Freeze the Bell Peppers
Your next step is to flash freeze the peppers, which is how you'll make sure that they don't stick together in one big bell pepper mass in the freezer.
To do this, just line a baking tray with parchment or wax paper and lay the bell pepper slices on top, taking care to keep them separated.
Then just put the tray in the freezer for about an hour, or however long it takes to freeze the peppers solid.
Step 3 - Put the Frozen Bell Peppers in Freezer Safe Containers
Everyone slices bell peppers differently. If you're looking for a way to do it quickly without wasting any of the good parts of the pepper, this video can help you out.