For a shortcut, start with 2.5 cups of canned beans, drained and rinsed. This is MUCH better if you cook the beans yourself! The lemon juice and stock add flavor and lighten the texture. This recipe is also much better if you roast the garlic. It is easy to do—just put your oven on 375°F or so and put the cloves, WITH THE PEEL STILL ON, in until the peels turn a bit black, about 15 minutes. Let them cool and they peel very easily.