1. In a large skillet, heat the oil. Add the onion and fennel and cook over moderately high heat, stirring, until softened, 3 minutes. Add both chiles and the bell pepper and season with salt. Cook over moderate heat, stirring, until softened, about 8 minutes. Add the garlic, harissa and paprika and cook, stirring, until fragrant, 1 minute. Add the tomatoes and water and simmer over low heat until the sauce is thickened, 10 minutes.
2. Crack the eggs into the sauce. Cover and cook over moderately low heat until the whites are firm and the yolks are runny, 5 minutes. Spoon the sauce and eggs into bowls and sprinkle with the parsley and crumbled feta. Serve right away.
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