How do I track the calories of my meal that I had

Answers
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You log the foods you've eaten in the food diary here.
For accuracy, food scale is better than measuring spoons/cups, and spoons/cups better than eyeballing amounts to estimate, especially for calorie-dense foods.
Ideally, don't use other people's recipe entries in the food database (things like "ham sandwich", "meat lasagna", "farmers omelette") because you don't know exactly what they put in them, like how much butter/oil, how much cheese, mayo vs. mustard, etc. Put in the ingredients you actually used and ate.
In general, check the entries you use against the product label in your hand, or an authoritative outside source, the first time you log them, to make sure they're right. Bar-coded entries aren't guaranteed to be right, BTW - still need to be checked. Once you log them, they'll come up first in your frequent/recent foods when you go to log an item, so you don't need to verify those every time.
Here's an authoritative outside source:
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