I've been using this pan for nearly a year now and it works fabulous: https://secure.lodgemfg.com/storefro...%7D_L8SGP3.jpg
Apply a few tablespoons of oil on the bottom and brush in, them mound on your cut-up veggies. Make them big enough so they stay on the upper surface of the ribs. I use a 1/3 cup of water to add steam and them put the pan on the grill, highest heat with the cover down. Season over the veggies, and turn once while cooking, about 6-10 minutes depending on what you are cooking.
Since the veggies aren't sitting in oil its a lot healthier than frying. Clean up is a snap just a let the pan cool, add a cup of hot soapy water and scrub with a paper towel then rinse immediately with hot water and air dry.