As Dragonbones said, risotto rice is expensive here, the import supermarkets want in excess of NT$340 for a box…
Costco has affordable hard Italian cheeses, at least compared to the supermarkets.
Pasta is very readily available and I’d suggest RT-mart for some of that stuff as they have their own store brand which imports a lot of stuff from Europe and the prices are better than Carrefour’s in-store brand.
Again I found a passable pasta sauce base in RT-mart, as it only had tomatoes, garlic and some spices in it, unlike some of the other pre-made stuff here that looks horrible.
Tinned tomatoes of any kind is quite expensive here, at least in comparison to Europe.
Carrefour has a selection of fresh pasta, but for over NT$200 a packet, but there’s a local guy (albeit a foreigner) that makes it as well and some of his stuff is at least for sale in Costco, but I haven’t tried his stuff, so dunno if it’s any good. He also makes pasta sauces that are on sale in Costco. All his stuff can also be found in Jasons.
The import supermarkets also carry a wide range of fancier pasta, for a price.
I tend to pick up odds and ends when I go abroad, Hong Kong is far more affordable than Taiwan for any speciality stuff, even though some of the shops are the same. Sometimes you just have to plan for a shopping trip there