Preheat oven to 160°C.
Whisk together eggs and milk in a bowl and season.
Stir in tomatoes, cheese and spinach.
Divide equally in a prepared muffin tray.
Bake for 10-12 minutes until cooked through.
Allow to cool on a wire rack before storing in an airtight container in the fridge.
Cook’s note: Swap spinach with any other veggies your kids like. You can even add tuna or chicken.