Zarangollo Murciano is a simple Spanish dish in which zucchini and onion cook slowly until meltingly tender, then meet softly set eggs. The texture should be moist and spoonable rather than firm like an omelet.
Halve the zucchini lengthwise and cut it into slices about 4 mm thick. Thinly slice the onion. Keeping the pieces similar in size helps them soften at the same rate.
Heat the olive oil in a wide skillet over medium-low heat. Add the onion and 1/4 teaspoon salt. Cook for 8 to 10 minutes, stirring often, until translucent and very soft. Do not rush this stage or let the onion brown deeply.
Add the zucchini and another 1/4 teaspoon salt. Cook uncovered for 20 to 25 minutes, stirring every few minutes. The zucchini should collapse and release its moisture. Continue until most visible liquid has evaporated but the vegetables remain glossy.
Beat the eggs lightly with the remaining salt and black pepper. Lower the heat, pour them over the vegetables, and fold slowly with a spatula for 2 to 4 minutes. Remove the pan while the eggs still look soft; residual heat will finish setting them.
Rest the Zarangollo for five minutes, then serve warm or at room temperature with bread and a simple salad. Sprinkle with parsley if desired. Refrigerate cooled leftovers in a covered container for up to two days and reheat gently.
If the finished dish looks watery, the zucchini needed a few more minutes before the eggs were added. Evaporating that moisture is the key to a creamy, concentrated result.
Zarangollo turns zucchini, onion, eggs, and olive oil into a generous meal through patient, gentle cooking.