Preheat the oven to 200°C (400°F).
Dice the onion and chop the tomatoes (or open tin).
Mix the onion and tomatoes with the spinach.
Add everything else and stir up, leaving only the eggs aside.
Grease the bowl/s with a little olive oil by wiping it round. Place mix into two small ovenproof bowls (or one large) and make a well in the centre of each.
Crack the eggs and pour into the wells.
Place in oven and cook for 20 minutes at 200°C (400°F).
Keep an eye on the egg - when it looks cooked then remove the dishes from the oven, there’s no need to cook any longer. In my oven it takes around 22 mins, in Howie’s, 18.
Add another dash of salt and pepper to the top.
Enjoy with nice, crusty bread.