Can u sue a fast food place for finding a piece of metal sponge in your food?
You can sue just about anyone for anything, but the first question is always going to be: What are your damages? If you were not injured, require medical attention or otherwise suffer actual long-lasting damages, the "value" of any lawsuit isn't typically worth pursuing.
Your damages appear to be the cost of your meal.
Glad you weren't hurt. If there's something more to this story, you may want to schedule a face-to-face consultation with a products liability or personal injury attorney to discuss your options.