Bring a large pot of water to a simmer. Add the fava beans and cook, stirring occasionally, for 3 minutes. Add the peas and continue to cook for another 2 to 3 minutes.
Drain and rinse under cold water to maintain their color. Once cool enough to handle, sift through and slip off the skins from the fava beans (the white outsides of the shelled beans are edible but I find the texture gets in the way of this dish).
Put the fava beans, peas, mint, garlic confit, and oil in a large bowl and roughly mash.
Season with salt and serve or set aside (it's great warm, at room temperature, and even cold).
Notes
Gluten free, Parve, Vegan, Vegetarian
Substitute frozen favas and/or peas if fresh is not available. Defrost first by running under cool water or add a few minutes to the cooking time.
Recipe by Katherine Martinelli at http://www.katherinemartinelli.com/blog/2013/minted-fava-pea-mash/