12. Take tomatoes and two small white onions and slice them into wedges - you want them to be big and chunky. Then go ahead and add them to the tom yum.
13. If you’re using shrimp for this tom yum recipe, you might get some foam build up on top of your soup, in which case you can just lightly skim it off the top and toss it out.
14. Boil the tom yum for about 2 - 3 minutes.