How to Make It
Preheat broiler with oven rack in middle of oven. Heat oil in a 10-inch ovenproof skillet over medium-high. Add onion; cook, stirring often, until translucent, 5 to 6 minutes. Add garlic and jalapeño; cook, stirring often, 2 minutes. Add harissa, cumin, and cayenne; cook, stirring constantly, 30 seconds. Stir in tomatoes, tomato paste, salt, lemon zest, and bay leaves. Simmer, stirring often, until slightly thickened, about 10 minutes. Remove from heat.
Make 4 indentations in tomato mixture; place 1 egg white in each indentation. Broil in preheated oven until whites are just set but not cooked through. Remove from oven. Cut a tiny slit in each egg white, and add 1 egg yolk to each white. Broil until yolks are slightly set and whites are cooked through, about 2 minutes. Sprinkle with cilantro.