My method is to fry your choice of veg, we usually have a sliced pepper, onion, courgette, halved cherry toms. Put these in an oven dish. Beat 6 to 8 eggs in a jug, season it, add in finely grated parmesan. Pour all this over the veg and scatter cubes of feta or other cheese of choice, ensuring some are 'submerged' and others are more exposed. Grate more cheese over the top if you want. Put in the oven at about 200C for 10-15 minutes, check the centre to see if it needs longer. Cut into portions to serve with salad or whatever side you desire. It does well for later or the next day when cooled. Very adaptable according to your veg/cheese preferences.