I usually try to find the restaurant in the food database to see if the desired food is there. If it's not, I just search for something similar, like "Beef Soup" - it will give you options such as 'beef barley soup,' 'beef vegetable soup,' 'beef noodle soup,' etc... Then just choose the one that's closest to what you ate. It's not going to be an exact match, but it will at least keep you close!
Also, after you've done this calorie-counting thing for awhile, you get better at estimating how many calories something should be and you can edit the serving size to reflect how many calories you think it probably was. For example, was it cream-based or broth-based? Lots of veggies in it or something starchy as a filler (noodles/rice/dumplings)? That will help you figure out what to log.
Someone who is busier than you is working out right now.
There will come a day when you can no longer do this. Today is not that day.