Preheat your oven to 450 degrees F (230 C).

Cut your red bell peppers down the center into two halves and remove the stem and all the seeds. With a small knife, remove as much of the white membrane on the inside of the pepper as you can. 

Place your pepper halves face down on a aluminum foil lined sheet pan. 

Bake for 20 to 25 minutes or until the skins of the peppers are turning fairly black. 

Remove your peppers from the oven and transfer into a bowl large enough to hold all of them. At this point you want to steam them slightly to make the skins easier to remove. You can either cover your bowl with another inverted bowl or you can cover your bowl with something like plastic wrap. Covering a bowl with a cutting board will also work. You're just trying to trap the stem in with the roasted peppers. 

After about 5 or 10 minutes your peppers should be cool enough to handle. 

Remove from the bowl to a cutting board and carefully strip off all the skins and the burned or charred bits of pepper skin or flesh. Discard all the burned parts and the skin. 

Slice your roasted peppers into slices or large pieces depending on what sort of application you want to use them on. I like to slice in long strips and then cut those strips in half. 

After you finish slicing your peppers in the manner that you like, you should season them with salt and pepper and taste one to make sure you think they're seasoned properly. 

Store in a container in the refrigerator for up to a week or you can cover the peppers in oil and store for at least two weeks.