Portland has an amazing food cart culture offering a broad mix of international cuisines, including Cuban, Ethiopian and Czech, as well as American favorites -- cheese steaks, sausages and fries. And while taco trucks might be a dime a dozen in other parts of the country, they may not be the first thing you think of when someone mentions Portland. We've walked by the food carts in downtown Portland a few times, always on a weekend, because we just don't seem to plan trips on weekdays when most of them are open. This time we got smart, planned a trip arriving on Friday and got there in time for lunch. I've been bookmarking food carts to try for ages -- Kim Jong Grillin, Solar Waffle Works, Chili Pie Palace, but for this quick trip, we were centered downtown, which focused our options.