Roasted Asparagus With Feta with seasoning

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 lb asparagus , trimmed 1 teaspoon olive oil (preferably extra-virgin) 2 large tangerines or 1 small orange 1/3 cup fresh tangerine juice or 1/3 cup orange[...]