I have a similar experience to this recipe's author in that this is one of the first vegetable dishes I discovered in Japan that I went wild over. I always got excited when I saw this on the dinner table. It took me several different recipes for it and attempts to make it at home before I got it to taste good, but this particular recipe has worked well for me. I strongly recommend this for children or people who might be unsure whether they like spinach -- I refused to eat spinach any way my mom prepared it, but I loved this immediately.
Notes:
- Please please please do not skip toasting the sesame seeds. It makes a big difference.
- The biggest key to this recipe working correctly is making sure that you thoroughly squeeze out the water from the spinach after it is cooked. Any excess water will dilute the dressing and it will not taste as good.
- I saw my host mother make the dressing entirely in the mortar bowl (adding the soy sauce and sake to the ground sesame and sugar, mixing it, and then pouring over the spinach) but I have a feeling that the soy sauce could stain the inside of the mortar and it can be harder to scoop out of the grooves when it's wet because it's fairly thick.
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RECIPE: Horenso no goma-ae (from Let's Eat Japanese Food, by Amy Kaneko)