Make this recipe a recipe that people in that category can eat. categories: ['vegetarian'], recipe: in large saucepan, cook onions in butter until soft. add potatoes, chicken broth, parsley, thyme, celery seed, salt, and pepper to saucepan. simmer for 15 minutes. add milk to saucepan. puree half of soup and flour in blender. return to saucepan. heat through.

Target recipe: melt butter in a large frying pan. add leeks and onions, and sauté 3-5 minutes, or until soft. transfer vegetables to large saucepan or stockpot, and add potatoes and broth. bring to a boil until potatoes are soft, about 10-15 minutes. transfer to a blender and puree, incrementally adding cream (unless you make a small batch, you'll have to do the blending in several steps). garnish with cheese, salt, and pepper.