Tracking & Logging Family Meals

How do you figure out how much you ate when making a family meal? Example tonight I made a stir fry for the family. Beef, zucchini, pepper, onion, broccoli, frozen corn, garlic in a little olive oil. All that got mixed up in the stir fry so How figure out how much I ate of the cooked meal? I measured/weighed all the stuff before but how do I put it in mfp?

You can watch our video on How to Calculate a Recipe HERE.