Pretty much any that you want! This is a great all year round recipe, so think of which vegetables are in season when you're making it. In the spring and summer try zucchini, cucumber, tomatoes, summer squash, peas, eggplant, carrots, spinach, or bell peppers. In the fall and winter try cauliflower, broccoli, brussels sprouts, winter squash, pumpkin, potatoes, or radishes.