A main course and a salad in one: polenta, arugula, and portobellos with a warm balsamic sauce. The trick to grilling polenta is to know when to flip it. Wait until the entire piece can be lifted off the grates cleanly with a metal spatula.
Diced roasted beets (and crisp cucumber) are like colorful confetti on top of grilled asparagus. Roasting is a great way to cook beets; it concentrates juices, intensifies flavor, and yields tender roots.