That sounds really yum! Just not sure if we have mirin at home...
Here's some links to recipes I love. I lost a lot of my bookmarks when I transferred to WIndows 10, so here's a few I managed to recall.
My all time favorite brownie recipe: salted caramel brownies
Plus you have a huge amount of leftover caramel sauce to eat up haha.
Quite some work but just deeeelicious: French macarons! This is a Dutch site, but I'm sure you can use google translate. there's a lot of other good recipes on the web too, but I found this video to be very helpful. Should google translate be a butt, this one's in English, but I'm unsure how well that one goes. Plus they don't mention how to make yum frosting.
Very important in macarons is to let them rest for about a day (don't eat it right after making it). The flavoring of your filling will get the chance to soak into the cookie parts.
I also found the sushi salad recipe online. Again, it's in Dutch, let me know if google translate sucks and I'll try to translate it better ^^
Recipe link! Please, use real sushi rice. It's not the same as regular rice at all, you need the stickiness! You can make your own wasabimayo by mixing wasabi (liquid or powder, we prefer powder) with mayo and taste until you like it. Don't put too much in because it's really hot. You can find nori in some stores at the exotic corners, or you can buy it online, it's a dried ingredient so there's no issues in that.