Unroll the pastry and cut into 12 even squares. Grease a muffin tin, and line each tin with a pastry square, making sure the pastry is evenly lined, trim the edges of excess pastry. Gently prick the base of the tartlets with a fork.
Heat the olive oil in a frying pan over a medium heat. Sauté the grated courgettes and baby spinach for 3 – 4 minutes and add in the bacon. Set aside.
Whisk together, the eggs,cream and milk and season with salt and pepper.
Divide the filling into the 12 tartlets and pour over the egg custard. Sprinkle over feta cheese and bake for 15 minutes, the tartlets should be golden in colour and cooked through.