I need to come clean about something before we even start: I’ve only eaten at La Route Du Miam once. One dinner, one trip to Nice, France. That’s it. And yet — completely unfair as this is to every other family-owned restaurant I’ve walked into since — La Route Du Miam has become my “standard.” The bar I didn’t know I was setting. I know it’s presumptuous to let one meal define how I judge every mom-and-pop spot in Europe from now on, but that’s exactly what happened. La Route Du Miam did that to me, and honestly, I’m not even mad about it. So consider this less of an…