So I looked up a recipe. This is the bay area; I didn't have any trouble finding the special rice, or the coconut milk. But the cooking was ... complex. The sticky rice is supposed to be soaked, and then steamed (with actual steam, not like "steamed rice") It didn't come out very well...
So several years went by, and I started experimenting with Sushi. And I had an idea on how to CHEAT making sticky rice with mango...
Step 1: Ingredients
Short grain (sushi) rice. You should be able to find this anywhere.
Coconut cream. Yeah, the kind you get at a liquor store for Pinå Coladas.
Dried mango (or fresh, but that wouldn't be cheating as much!) This has been appearing in upscale gormet markets and such.
Rice Paper (optional). For the outer covering of your sushi, if you want. I've only ever seen this in Asian markets, so it may be hard to find.
Step 2: Prepare the Mango.
while the rice is cooking.
Step 3: Cook the Rice
Cook as for normal steamed rice: bring to a boil, cover and simmer on low heat till the liquid is all absorbed (about 15 minutes.) Remove from heat and allow to cool at least until it can be handled without burning you.
You can refrigerate the rice for some time, but you may need to warm it slightly to get it to an appropriate consistancy to mold into sushi or ball shapes.
Step 4: Make Sushi!
Or, just arange to get pieces of mango inside clumps of rice, "rice ball" style. There's already a nice Rice Ball Instructable
Refrigerate till near serving time. No raw fish, no meat, it should keep quite a while...