When you have nine-to-five schedules, making a tasty, healthy homemade dinner can feel like the worst chore in the world, especially if it's been a rocky day at the office or a busy night looms ahead. The eating out option is fine occasionally, but your waistline and wallet will complain if you do it too often. You want something speedy yet nourishing. That's when cookbooks like Mark Bittman's Kitchen Express have come to our rescue. After successfully testing a few recipes while we borrowed it from the library, we knew we had to have our own copy...which would up under the Christmas tree. Organized by season (a structure we've ignored), the cover promises that any of the four hundred plus recipes inside take twenty minutes or less to whip up. Of the dishes we have tried, Bittman's Lemony Red Lentil Soup with Cilantro has made the most return appearances on our table. Cook a chopped onion in olive oil in a saucepan until soft; add one cup of red lentils and f