Roasted Asparagus Soup with sprinkles

5 pounds asparagus, trimmed, cut into 2-inch pieces (14 to 15 cups) 4 cups chopped leeks (white and pale green parts only; about 4 large) 1/4 cup olive oil 6[...]

1 bunch asparagus , cut into 1-inch pieces 1 onion , chopped 1/2 cup celery , chopped 2 garlic cloves , minced 1 tablespoon pure olive oil 2 tablespoons flour[...]