Heat the oil in a non-stick pan on a low-medium heat. Add the tomatoes and spring onions, and cook gently for 3-4 mins until softened.
Add the feta and cook for 1 min to warm through, then pour in the eggs and chives. Season with pepper and keep stirring to scramble the eggs. Put a handful of the spinach on a plate and top with the eggs. Serve the rest of the spinach on the side.