It casts the same spell as pizza. You'd have a hard time finding someone who doesn't really enjoy it. It even works on people who don't generally like salads.
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I read their point as being: the first time you try pizza you're like "this is delicious and amazing." The first time you try Caesar salad it lights you up in the same magical way.
I could be wrong of course - but that definitely fits my own experience. The first time I had a chicken CS as a kid in a restaurant, it was all I wanted to eat every time we went out for months afterwards. I genuinely couldn't believe 'salad' could be so delicious.