Boil fava beans per package directions and cool in cold water. When cool enough to handle, slip off the outer skin and put the beans in the food processor.
Add the goat cheese, garlic, onion, oil, lemon zest and juice, mint and salt and pepper.
Process until until well mixed scraping down with spatula and adjusting to taste.
Turn into a bowl, cover and chill for at least 1 hour before serving.