Roasting peppers is the easiest thing to do.
You can use any kind of bell peppers you want. Wash them well, cut them in half vertically. Scoop out all the seeds and membranes. Place them skin side up and press down with your hand to flatten them a little. Some parts will break a little, that's ok.
Cover a shallow pan with aluminum foil and place the peppers skin side up. I use the broiler pan that came with the stove. Broil them in the oven, about 3 inches from the heat for about 12 minutes or until the skin is blackened.
Place them in a zip top plastic bag, seal the bag and let them stand for about 15 minutes (helps to peel them). Peel and discard skin, place the peppers in an airtight container in the fridge.
I don't know how long they last b/c I eat them so quickly!
I use them for everything. Hummus, sandwiches, stews, salads. They're awesome.