@clew I'm not entirely sure what kind of dried herbs are readily available in UK supermarkets nor of the price of garlic and onion there, which are obviously constraints. But the recipes are downright weird, and could be made closer to the real deal by swapping some out-of-place ingredients with an onion and some herbes de Provence or approximation thereof (shouldn't be harder to find than ready-made tzatziki ?). I'd be less annoyed if they were called "Mediterranean-inspired" I think.