Most people eat arugula greens (also known as rocket), which have a lemon-pepper flavor, in a salad. But this leafy vegetable is also wonderful in a pesto or to dress up a pizza or pasta. Buy it by the bunch, remove the stems, and thoroughly rinse the leaves, which can be quite sandy, in cool water. To make this pasta, cook spaghetti, and while it bubbles, saute red onion, garlic, and lime rind in olive oil, then add the spaghetti to the pan. Toss with lime juice, a dash of cayenne, chopped basil, and a few cups of arugula. The heat of the spaghetti cooks the vegetable.