1. Heat the olive oil in a large pan set over medium heat. Add the onion and jalapeño and cook, stirring occasionally, until softened, six to eight minutes. Add the garlic, coriander, cinnamon, and salt and cook, stirring, until fragrant, one to two minutes.
2. Add the spinach and lemon juice to the pan, turn the heat to low, cover, and cook, tossing occasionally with tongs, until the spinach is very soft, seven to 10 minutes. (If the spinach does not fit all at once in the pan, add a little at a time, adding more as the spinach in the pan wilts.) Uncover and evenly spread the mixture across the bottom of the pan. Use the back of the spoon to make four to six shallow indentations in the surface of the greens mixture to hold the eggs while they cook.
3. Break the eggs into small cups and gently slide them into the indentations. Raise the heat to medium, cover the pan, and cook until the whites are set but the yolks are still a bit runny, four to five minutes. Remove the pan from the heat. Drizzle a little more olive oil on top and sprinkle with pepper, feta, and cilantro. Serve hot, directly from the pan.