What the heck is a serving.
5 to 10 a day

Eating five to ten servings of vegetables and fruit per day as part of a healthy diet can help reduce your risk of cancer, heart disease and stroke.

The food guide recommends a daily intake of:-

5-12 servings of Grain Products
5-10 servings of Vegetables and Fruit
2-4 servings of Milk products
2-3 servings of Meat and Alternatives. Choose leaner meats, poultry and fish, as well as dried peas, beans and lentils more often.

Here is the official info on servings:-