Green vegetable and feta pie

Name: Green vegetable and feta pie
Ingredients: olive oil; 1 head spring greens, shredded; 2 courgettes (roughly 350g/12oz), grated; 3 garlic cloves, crushed or grated; 400g tin butter beans, drained; 400g/14oz frozen spinach, defrosted and drained thoroughly; 2 free-range eggs, beaten; 150g/5½oz feta, crumbled; 1 lemon, finely grated zest only; 1 tsp dried oregano; ½ tsp dried mint; pinch ground nutmeg (optional); 200g/7oz filo pastry; 30g/1oz butter, melted; pinch sesame seeds; salt and freshly ground black pepper