It sounds like one of those futuristic robot heroes of Japanese animation announced in basso profundo voice-over: TAR-A-TOR! In fact, it is the walnut-and-garlic sauce which you will find dressing runner beans in the salad section.
The fresher the walnuts the better, so make your children shell some as a Christmas penance. If using packet walnuts, then open them exclusively for the sauce. After being left to sit and fester in the cupboard for a few weeks your tarator will scare more than the children. It makes an unusual pasta sauce, but is extraordinarily rich so you need only swabbing amounts to make the point. Check with your guests that they can eat walnuts; it is surprising how many people they upset.