Preheat an oven to 350 degrees and spray 6 muffins tins with pan spray. In a bowl, mix together a drained can of tuna, the first amount of salt, mayo, celery seed, and shredded cheddar.
Step 2
Portion out the tuna mixture into each muffin tin. Then, cut each grape tomato in half and place 2 halves in each muffin tin.
Step 3
In the same bowl or a new one, whisk together the remaining ingredients. Pour the egg mixture over the tuna in each muffin tin.
Step 4
Bake the tray for 18-20 minutes, until the egg is cooked through and the tops are lightly golden.