01 - Preheat your oven to 375°F.
02 - Drizzle olive oil in a small ovenproof skillet or baking dish.
03 - Sauté onions and bell pepper over medium heat (in the same skillet if ovenproof) for 3–4 minutes until softened. Add garlic and cook another 30 seconds.
04 - Add tomatoes, oregano, and black pepper. Sauté for 2–3 minutes, letting tomatoes release some juice.
05 - Remove from heat. Stir in feta (and optional Greek yogurt); spread evenly.
06 - Using a spoon, make 4 small wells in the mixture and crack one egg into each.
07 - Sprinkle lightly with salt, red pepper flakes (if using), and a drizzle of olive oil.
08 - Transfer the skillet/baking dish to the oven. Bake 10–14 minutes, or until eggs are set to your liking.
09 - Garnish with fresh parsley. Serve immediately with crusty bread or pita if desired.