Preheat the oven to 190°C. Place a sheet of filo in a 28 cm loose-bottomed tart dish so the edges hang over the side and brush it with melted butter. Repeat until all the filo is used up.
Sprinkle the feta, spring onions, garlic, olives, thyme, parsley, silverbeet and spinach evenly over the pastry. Pour the eggs evenly over the top. Sprinkle with salt and pepper, and fold the overhanging filo over the filling. Brush the top of the pastry with the remaining butter.
Place in the oven and bake for 40-50 minutes until well cooked and the eggs set. Remove from the oven and allow to cool until warm. Remove from the dish and serve in wedges.
