Bring a pot of salted water to a boil. Par-boil the potatoes for 3-5 minutes and drain.
Meanwhile, make the marinade.
Prepare a rimmed baking dish, preferably with a lid, that will fit the potatoes without crowding them too much.
Put the potatoes in the pan
Sprinkle with diced shallots
Lay lemon slices on top of potatoes and shallots (I used 3) for additional lemony flavor.
In a measuring cup or small bowl, combine the garlic, mustard, miso, lemon juice, water, nutritional yeast , sea salt and black pepper to taste.
Whisk together until you have a smooth marinade.
Pour the marinade over the potatoes
Leave the potatoes to marinate covered, in the refrigerator.
Preheat oven to 400° F
Cover the marinated potatoes with a lid, or tin foil.
Place it in the oven and bake for 1 hour, stirring halfway.
Remove the lid and bake, uncovered, for 20-30 more minutes, stirring halfway, until the potatoes are crispy to your liking.
Serve with lemon slices, sliced green onion