guide
Is onion tayyib or khabīth?
Cooked onion is tayyib. Raw onion is khabīth. The line is binary, but the why and the how take a longer look.
The binary rule
Onion in the Tayyibat system is allowed only when cooked. Soups, stews, tagines, sautés, all integrate onion freely. Raw onion in a salad, in a sandwich, in a tabbouleh, all excluded. The reasoning is digestive load. Raw onion contains volatile sulphur compounds (allyl sulphides, isothiocyanates) that the doctor reads as gut irritants, generating histamine release and an inflammatory cascade. Cooking degrades these compounds and converts them to caramelised sugars that the system reads as tayyib.
Why blended is preferred
The system has a preference: blended or finely chopped onion is preferred over rough chunks. Reason: blended onion melts into the sauce, losing its fibrous structure and distributing its caramelised sugars evenly across the dish. Chunky onion, even cooked, can retain a partial bite of its raw sulphur taste. Levantine and Egyptian grandmothers know this instinctively, hence the long mirepoix-style sweat at the start of every soup or stew.
Cooking methods that work
Three methods integrate onion well into the system. One: long simmer (45+ minutes) in a stew or tagine, where the onion dissolves completely and thickens the sauce. Two: pan-sweat in ghee (15 to 20 minutes on low heat), classic North African and Egyptian base for any meat or fish dish. Three: roast in oven at 200 °C for 30 minutes (whole onions in skin, then peel and chop). Methods to avoid: quick high-heat sear that browns the outside while keeping the inside crunchy and sulphurous; raw onion in a marinade where heat never quite finishes the job.
Traditional dishes that pass, dishes to skip
Pass: kabsa Saudi (onion sweated in ghee 20 min, no raw onion garnish), molokhia Egyptian (blended into the green sauce), tagine Moroccan (sliced thin and confit-style cooked), mansaf Jordanian (sweated in ghee for the lamb broth). Skip or modify: foul medames (the standard chopped raw onion topping), shawarma in pita (always with raw onion slices, ask for none), kufta with raw onion garnish, tabbouleh with raw onion. If a dish brings raw onion as garnish, ask for it on the side or skip it. Habitual diners at North African restaurants know to ask sans oignon cru.
Practical kitchen workflow
Buy white or yellow onions, never red (which is more often eaten raw). Store in a cool dry pantry, never the fridge. Before any meat or fish dish, peel and roughly chop, then blend in a food processor with a tablespoon of cold water for 10 seconds (paste consistency). Add the paste to ghee in a wide pan, cook on low heat for 15 to 20 minutes until translucent and lightly golden, stirring every 3 minutes. This is the universal Tayyibat base for protein dishes. The pan smells sweet, not pungent. If it smells pungent, the heat is too high, the onion is browning, you are losing the sugars to caramelisation.
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This article relays the public teachings of Dr. Diaa Al-Awadi for educational and informative purposes. It is not medical advice. Consult your physician before any dietary change. Legal notice.