If tomato (in any form) is the characterizing ingredient that gives the product its essential character, it classifies under 210320. If chili pepper or another ingredient predominates and tomato is incidental, the product falls under 210390. Ingredient percentages and the product's commercial description are both relevant; a CBP binding ruling resolves ambiguous formulations.

Mustard flour and meal — ground mustard seed without added vinegar, salt, or other condiment ingredients — classifies under 210330 alongside prepared mustard. The distinction within that subheading is between the raw milled product and the finished condiment. Both are in 210330, so the practical classification question is whether a product is mustard-based at all versus a mixed seasoning blend that happens to contain mustard.