You will need
Adjust the oven rack to the middle position. Preheat the oven to 160°C. Sauté the spring onions lightly in the olive oil. Remove from heat. Add the Cheese Sauce and feta cheese. Beat the egg lightly and add to the mixture together with Green Onion Seasoning. Spoon the mixture into the pre-baked pastry shells and bake for 20-25 minutes until puffy and nicely browned. Serve warm or at room temperature, garnished with watercress.
Replace the feta with ¾ cup grated pecorino cheese.