Yes, there is a time stamp. The easy way to edit it is after the food has been added. Just select edit and look at the time at the bottom right side.
when I say go to yesterday, choose a food and click edit it brings up the macros of that food and the serving side I had etc. Nowhere on that screen does it show what time it was entered into the app. Thanks
Go to Settings, then Turn on under Track Meal Time.