This tomato was languishing in the fridge. Moisture had gotten trapped in the container holding the tom, and the result when seen up close is shown...
I believe what you have here is sporangia. (A single-celled or many-celled structure in which spores are produced, as in fungi, algae, mosses, and ferns.)
Close-up and macro
Canon EF 100mm
Paul Iddon Canon EOS 550D
Jenny-D, capto, Jasper87 and 9 more