According to the USDA, one serving of meat is equal to two or three ounces, which is about the size of a deck of cards. The USDA Food Pyramid suggests two or three servings of meat per day. This meal would satisfy that requirement all alone. The potatoes, lettuce, and tomato would total about five servings of vegetables and the USDA Food Pyramid suggests a total of three to five per day. Again this meal covers all the servings of vegetables you should have for one day.
It is also important to note that a meal like this may have up to 1500 calories. Unless you are very active, that would be way too many calories for one meal.
Next, let's look at a similar meal, but with better portions.
