By EatingWell Editors, "Balance Your Diet," EatingWell In Season: The Farmers' Market Cookbook (2009)

Vegetables and fruits form the foundation of a healthy diet. But you can’t live on produce alone. To get all your essential nutrients, you’ll also need to eat whole grains, lean protein (fish, lean meat, beans or low-fat dairy foods) and healthy fats, including nuts and olive oil. How much do you need? Balance your diet in three easy steps.
Does your plate look more like A or B?
Whatever you answered, you should aim to model (or keep modeling) your plate after B. Low-calorie—yet satisfying—vegetables fill half the plate. The other half is divided into two equal portions (quarters). One is filled with a lean protein, the other with a whole-grain or starchy vegetable.