I didn't find fhe eating choices in the Niseko area massively good, in fact they were downright disappointing. Lonely Planet's recommendations were just, well, underwhelming. I ended up in a bar that served ramen both nights (Otsukisama and Bar Moon) and it was pretty good...but not mind blowing.

EDIT - I have to add that the Hilton Niseko resort offered such a good and bountiful breakfast that I didn't need anything all day until the evening. The cluster of eating establishments in the ski resort style shopping area behind the Hilton hotel did not get good reviews online, so I didn't try them.