Preheat the oven to 190°C (fan 170°C), gas mark 5.
Lightly grease a 6-hole muffin tin or use silicone muffin cases.
In a bowl, beat the eggs and stir in the dried herbs, a pinch of salt, and plenty of black pepper.
Mix in the vegetables with the beaten egg.
Pour the egg mixture evenly among the 6 muffin holes.
Sprinkle the crumbled feta cheese or grated cheese on top of each muffin.
Bake in the preheated oven for 15-18 minutes, or in an air fryer using the bake function at 170°C for 12 to 15 minutes. The muffins are ready when the egg is set and slightly golden on top.