3 buttered beets and celeriac Recipes

leeks (about 3/4 lb),white and pale green parts only, unsalted butter, olive oil, peeled fresh ginger, finely chopped, salt, divided, celeriac (celery root), peeled and chopped into 1/2-inch pieces, granny smith apple, peeled and chopped, red beets (about 1 1/2 lb), peeled and chopped into 1/2-inch pieces, low-sodium chicken broth, divided, water, divided, pepper, divided, inner celery leaves