Murcian Zucchini and Onions with Eggs
Zucchini and sweet onion cooked down slowly in olive oil until both collapse, then set with beaten eggs stirred through at the last minute so the pan stays loose and creamy.
Why You'll Love This Recipe
Murcia grows extraordinary zucchini and this is what they do with it, which tells you something. Zarangollo is three cheap things and time, and the time is not optional. If you rush the pan you get sauteed zucchini with egg on it, which is fine, and if you give it the full half hour you get something sweet and almost jammy that people ask about. I make it in August when the garden is producing more zucchini than any household can reasonably absorb, and it is the one preparation that never feels like a chore to eat.
The technique is worth understanding because it is not really frying. You keep the heat low, you salt early so the vegetables release their water, and then you let that water cook away slowly while the olive oil stays where it is. The zucchini goes translucent, the onion goes gold without browning, and by the end there is barely a distinct piece left. Then the eggs, beaten and poured in off the heat or nearly so, stirred just twice. Overcook them and you have a dry scramble. Pull the pan in time and the eggs are a soft binder rather than an ingredient.
This is lunch, or supper, or something you eat cold from the refrigerator at eleven at night standing up. In Spain it turns up as a tapa on toast, as a filling for a bocadillo, and on its own with bread to push it around. I like it best warm rather than hot, in a shallow bowl, with a lot of black pepper and more parsley than the recipe strictly calls for. It reheats well and it makes a whole zucchini glut disappear in one afternoon.
Ingredients
- 4 tbsp extra virgin olive oil
- 3 medium sweet onions (about 12 oz), halved and sliced thin
- 4 medium zucchini (about 1 3/4 lb), quartered lengthwise and sliced 1/4 inch thick
- 2 garlic cloves, thinly sliced
- 5 large eggs, beaten with a fork
- 1/4 cup chopped flat-leaf parsley
- 1/2 tsp coarsely ground black pepper
- 1/4 tsp fine sea salt
Instructions
- Start the onions low and slow: Warm the olive oil in a wide skillet over medium-low heat. Add the sliced onions and half the salt and cook for ten to twelve minutes, stirring every few minutes. You are after soft, translucent, and just barely gold at the edges. If they start to brown, add a tablespoon of water and lower the heat, since real color makes the finished dish taste caramelized rather than sweet.
- Add the zucchini and salt it: Stir in the zucchini and the rest of the salt. It will look like far too much for the pan. Cover and cook for five minutes, which draws the water out of the zucchini and drops the whole pile by half, then uncover and stir.
- Cook it down: Keep cooking uncovered over medium-low for fifteen to eighteen minutes, stirring every three or four minutes and scraping the bottom. The zucchini turns from opaque to translucent and the pieces begin to lose their edges. When you drag the spoon across the pan and the track stays open for a second before filling in, the water has cooked off and the vegetables are where you want them. Add the garlic for the last two minutes.
- Fold in the eggs: Take the pan off the heat for thirty seconds so it drops below a sizzle, then pour the beaten eggs over the vegetables. Return it to low heat and stir slowly with a wooden spoon, two or three passes only, folding rather than scrambling. The eggs should set into soft ribbons through the vegetables in about ninety seconds.
- Finish and rest: Pull the pan off the burner while the eggs still look slightly underdone, because they carry on setting in the residual heat. Grind the black pepper over the top, scatter the parsley, and let it sit for two minutes before serving. Warm rather than piping hot is how this is meant to be eaten.
Variations
- With potato: Add a peeled, thinly sliced gold potato with the onions for the heartier Murcian version, and give it an extra eight minutes covered before the zucchini goes in.
- Tomato and pepper: Stir in a chopped red bell pepper with the onions and a handful of halved cherry tomatoes near the end for a sweeter, redder pan.
- Smoked paprika: A half teaspoon of smoked paprika added with the garlic gives the whole dish a low, smoky floor.
- Mint in place of parsley: Chopped fresh mint over the top pushes it in a brighter, more summery direction and suits the sweetness of the onions.
- On toast: Pile it cold or warm onto thick toasted bread rubbed with a cut garlic clove, which is how it usually turns up as a tapa.
Storage & Leftovers
This keeps three days sealed in the refrigerator, and it is one of the rare egg dishes that is genuinely good cold. The vegetables go on sweetening overnight and the egg firms into something closer to a set custard, which is exactly how it is served as a tapa in Murcia, spread thickly on toast straight from the fridge.
To reheat, use a skillet over low heat with a teaspoon of olive oil, three or four minutes, stirring once. Do not use high heat and do not use the microwave at full power, because the egg tightens and weeps water and the texture you worked half an hour for disappears in ninety seconds.
I would not freeze it. Cooked egg goes rubbery and zucchini this soft turns watery on thawing. If you want to get ahead, cook the vegetables through step three, refrigerate them for up to four days, and add the eggs when you actually want to eat, which takes about three minutes.
Notes & Tips
- Slice the onions thin: Thick slices need longer than the zucchini and stay stringy. A thin, even slice is what lets everything collapse on the same schedule.
- Salt early, in two stages: Salting the onions and then the zucchini as each goes in pulls the water out at the right moment. Salting only at the end leaves you with wet vegetables and a flat flavor.
- Keep the heat below a sizzle: This is a slow melt, not a saute. If the pan is talking loudly, turn it down. Browning gives you a different and much less interesting dish.
- Watch for the spoon track: Drag the spoon across the bottom of the pan. If liquid rushes back in immediately, keep cooking. If the track holds for a beat, the eggs can go in.
- Beat the eggs properly: Thirty seconds with a fork until no streaks of white remain. Underbeaten eggs set in patches of firm white among the vegetables.
- Stop stirring early: Two or three folds is all the eggs need. Every extra stir breaks the soft ribbons into small dry curds.
Nutrition & Mindful Eating
- Zucchini, onion, olive oil, and egg are the entire dish, and each one is pulling a different way. The vegetables bring sweetness and bulk, the olive oil carries the flavor and keeps everything glossy, and the eggs turn a pan of soft vegetables into something with real staying power.
- Eggs are the reason this eats like a meal. Five of them across the pan bring protein and choline, and folded in at the end they also do the mechanical work of holding the vegetables together into something you can put on toast.
- Zucchini is mostly water, which is what makes the long slow cook possible: the water leaves, the flavor concentrates, and what stays behind is sweet and silky with a little gentle fiber and vitamin C along for the ride.
- Onions cooked this slowly turn genuinely sweet without ever browning, and that sweetness is the backbone of the dish. They also carry the kind of fiber that feeds the bacteria in your gut, and long cooking makes them easy on stomachs that find them sharp otherwise.
- Olive oil is used here in an amount that would look generous anywhere else, and it should be. It is the cooking medium, the sauce, and the reason the vegetables melt rather than fry, and its monounsaturated fat is what makes a plate of squash satisfying.
- As you eat, notice how little is left of the individual slices and how sweet the onions turned without ever browning, and let the warm pan be a reason to sit down properly for twenty minutes.
Frequently Asked Questions
Do I need to peel or seed the zucchini?
No on both counts for medium zucchini, which is what this is written for. If yours are the enormous late-summer kind, halve them and scrape out the spongy seed core with a spoon, because that part holds a great deal of water and will keep the pan wet no matter how long you cook it.
Can I make it without the eggs?
Yes, and the vegetable base on its own is a fine side dish or a topping for toast. You will want to cook it five minutes longer so it tightens up, since the egg is what holds the pan together. Adding a splash of cider vinegar at the end helps replace some of the richness.
Mine came out watery. What did I do wrong?
The zucchini did not get long enough uncovered. Zucchini is mostly water and that water has to leave the pan before the eggs go in, or it thins them out. Give it another five minutes over medium heat, stirring, and wait for the spoon to leave a track across the bottom.
Should the eggs be fully set?
Just barely. Pull the pan when they still look a little glossy and wet, because the vegetables underneath are hot enough to finish them on the way to the table. Eggs cooked to firm curds turn this from creamy to dry, and there is no undoing it.