Heat the oil in a large skillet over medium-low heat. Add the sliced onions and bell peppers. Cook until soft, about 20 minutes.
Add the sliced garlic and cook for about 2 minutes, until fragrant.
Add the cumin, paprika, salt, pepper and red pepper flakes and stir well to combine.
Add the crushed tomatoes and simmer the sauce until thickened - about 10 minutes.
Stir in the crumbled feta cheese.
Gently crack the eggs into the skillet directly into the sauce. Season the eggs with salt and pepper.
Cover the skillet with the lid until the eggs are set - about 8 to 10 minutes.
Garnish with chopped parsley.