Add two and a half cups of pure water (or vegetable stock) into large stockpot, and place metal or other steamer inside. Add torn greens, quartered, onion, and garlic. Turn heat to medium high and bring to a boil with lid on.
Steam until onions are soft (about 7 minutes, longer as necessary). Remove from heat.
Place steamed vegetables in high speed blender with about 2 cups of the water (or stock) from steaming. Add dill leaves, bouillon cube, nutritional yeast, coconut oil, ume plum vinegar, and dash of cayenne. Blend until completely smooth. Return to pot to keep warm.
Preheat oven or toaster oven to 415º. In a small bowl, mix breadcrumbs, olive oil, couple pinches sea salt, crushed garlic, and caraway seeds. Toss to thoroughly incorporate all ingredients. Place in single layer on a small baking sheet and bake for 3-5 minutes, until just golden brown and fragrant. Remove from oven and set aside.
Serve soup topped with dollops of creme fraiche, sprinkles of garlic caraway breadcrumbs, and fresh dill.
Freestyling alert: you can add just about any veggies you fancy, especially other greens like celery, zucchini, or broccoli.