Preheat the oven to 180C (350F / gas mark 4).

Whisk the eggs and milk together with a pinch of salt and pepper.

Heat the olive oil in an oven-proof pan and cook the red pepper for 3-4 minutes until softened.

Add the spinach and cook for 1 minute until wilted.

Pour in the egg mixture and scatter the feta over the top.

Cook on the hob for 2 minutes until the edges begin to set, then transfer to the oven and bake for 15-18 minutes until fully set and lightly golden.