Collards are nothing like spinach!!!!! They are more bitter, & must be cooked a MUCH longer time to get them tender as they are tough to start with. A rutabaga is simply a yellow turnip. My mom cooked them & served them mashed, like mashed potatoes. I, personally, can't stand them (or turnips, or collards, or mustard greens either!!!!) Guess I'd made a lousy vegetarian........