Yields around one quart
Just soak a cup of dried beans at least overnight in a couple of cups of water. Drain them and throw them into a pot with enough water to just more than cover them (an extra inch or so seems to be good). Bring everything to a boil uncovered, and then cut the heat back to simmer partially covered for about an hour or an hour and a half (when the skins split easily they have a good texture).
When you drain them save the liquid and use that when blending the hummus.
Scorch the skin off of the bell pepper over flame or under a broiler (optional — I leave the skins on and notice no difference), and then roast the pepper:
To roast the pepper, put the cut pieces in a baking dish with about two tablespoons of oil and pop it into a 400°F (205°C) oven, stirring every 15 minutes, until the pieces are tender and slightly blackened on the edges, about 45 minutes.
Conveniently, this is the same temperature garlic is roasted at, so you can roast both at the same time. I like mine a little blackened on the edges, but you don't want to go too far, as bell pepper can pass from roasted with just a touch of char to burnt and sad pretty easily.
Scrape sides of work bowl between processing runs if needed.
One time I decided to make hummus for folks and alas! I forgot to soak beans the night before. My strange friend came to the rescue with the equivalent amount of home prepared white beans and it was a good substitute (slightly different flavor, but the spices here really dominate). I used water from boiling dried tomatoes (slightly different recipe) as there was no fresh chickpea water on hand and it was delightful.
I've used cheap blenders, decent food processors, and a super-expensive blender to make this. It comes out adequately with most any equipment. You can just blend everything together at a moderate speed until the consistency is whatever you consider reasonably smooth, but processing in steps with a good food processor results in a slightly better texture.
I've done this with and without removing the skins, and I personally don't think it's worth the effort to remove the skins.
ATK suggests making an emulsion in several steps instead of throwing everything into the blender all at once. I ultimately integrated a modified versions of this into the recipe since it does result in an improved texture.
Trying 1 cup dry to sub for 2 cans. Should work fine since that's what I used to use a decade ago before I got lazy.
190g dry = 393g soaked = 447g cooked
Made a bit less hummus than two cans, if I had to guess I need another 150g cooked. Definitely need to measure drained can weight.
1 can drained = ? g
https://www.nigella.com/ask/using-dried-chickpeas says one can drained should be 250g, so I might only be 50g short. Felt like I was shorter though... next time do 1.5 cups dried beans and weigh everything again.
300g dry beans (1.5 dry cups) = 617 g soaked = 728 g cooked and drained