In a food processor, blend together tofu and ¼ cup oil.
Transfer mixture to a medium bowl and stir in matzo meal, nutritional yeast, salt, baking powder, onion, pepper, garlic, and celery seed.
Place dough in an air-tight container and refrigerate overnight.
In a large pot, saute onion, carrot, and celery in 2 Tbsp olive oil until soft.
Add dill and stock and set aside.
Using your hands or a cookie scoop, form mixture into 2" balls.
Drop balls into broth.
Bring broth to a boil, then reduce heat and simmer, covered, for 40 minutes.
Season with salt and pepper to taste. Serve hot.