The toppings for this meal-on-a-slice go way beyond the typical smattering of sliced mushrooms or peppers and into the realm of complete servings of vegetables. Needless to say, grab a fork and knife for this healthy and easy dinner, which comes together with just 20 minutes of active time.
Tip: Little Gem lettuce looks like a ruffly mini head of romaine. Find it at grocery stores and farmers' markets in the spring and summer. If it's not available, substitute romaine.