All-purpose flour: 60g (1/2 cup), Baking powder: 2g (1/2 tsp), Salt: 2g (1/2 tsp), Black pepper: 1g (1/4 tsp), Dried oregano: 2g (1/2 tsp), Eggs: 100g (2 large), Milk (1% fat): 120ml (1/2 cup), Spinach: 60g (2 cups, fresh, chopped), Feta cheese: 30g (2 tbsp, crumbled), Green onions: 20g (2, chopped), Olive oil: 10ml (2 tsp for cooking), Greek yogurt: 60g (1/4 cup, for serving), Lemon wedges: for serving