Garlic cut in half, place in foil, add the thick part of the stem of the green onions, drizzle with a tablespoon of olive oil. Wrap not tight to leave room for steam, and bake in a preheated 180 degree oven for 20 minutes.
Peel the potatoes and boil in salted water for 30 minutes after boiling. Then drain the potato broth, but do not pour out yet.
Put the chopped greens and green onions into the bowl of the blender, squeeze out the flesh of the baked garlic and baked onions, add olive oil. Add soy sauce. Whisk everything in a blender.