Prepare the potato by cutting it lengthwise into 4 slices. Put the slices on a lined baking sheet and cook for 30 minutes. Once cooked, set aside.
Meanwhile, put peas, fava beans, mint leaves, lemon juice, black pepper and nutritional yeast in a food processor and blend until mixture is mostly smooth or to the desired consistency. (I like a more chunky texture of the beans and peas.)
Pile the pea/bean mixture on the toast and enjoy.
Notes
You can cook the potato slices ahead of time and just warm them up in a toaster or toaster oven.Try putting the bean/pea mixture on a cooked portobello mushroom.