What is the story that you're trying to tell with the thumbnail? It seems like the chef (assuming it's the man on the right) is upset at something you may have done with his recipe, because he has this look like "what the-?" and holding his knife as if intending to get ready to use it. It makes for a funny image and it does spark curiosity.
I would probably zoom out the food photo so that more of the complete dish is visible. Currently, there is some asymmetry that's a bit distracting.