Bring a large pot of water up to a boil, and add a generous amount of salt. Drop the shelled fava beans into the water and cook for about 5 minutes, or until tender. Transfer to a bowl of ice water, and once cool, carefully slip the beans out of their skins and place them in the bowl of a food processor and discard the skins.

Add the salt, olive oil and lemon juice to the food processor and pulse until you achieve a slightly coarse puree. You can opt to leave it more chunky, or keep pureeing until very smooth. Taste and adjust the seasoning adding more salt or lemon juice as needed.

Preheat the oven or toaster oven to 350 degrees. Place the slices of bread on a baking sheet and bake for about 10 minutes or until lightly toasted. Spread each piece of toast with a generous amount of fava bean puree, then use a vegetable peeler to shave thin slices of pecorino over the top. Sprinkle with lots of fresh mint, and serve immediately.