From the first bite, my wife JingJing pronounces her comforting bowl of noodles hen didao authentic. “You don’t often see this in restaurants because it’s so simple and homey. If I was sick and staying home, this is what my mom would make,’’ she says. I’ve eaten her mother’s delicious cooking in China’s Hebei province, and this dish indeed has the fengwei, local flavor, going for it. That compliment brings a proud smile to Fu Wen Cai, the chef at the awkwardly named One of the Kind, the newest entry in the Asian food court at the Hong Kong Supermarket in Allston. “When I cook, I use my heart. Every dish is a little different every time I make it,’’ Fu says, explaining in Mandarin that everything is made from scratch, with no bottled sauces.