I really like the America's Test Kitchen Quick Family Cookbook. It has a good mix of child-friendly staples (pizza, mac & cheese, etc.) with more interesting and slightly more complex recipes. (I love the spinach and goat cheese calzone recipe.) The shortcuts are useful, not just using ready-made things from the grocery store; for example, microwaving sausage briefly to get it started cooking and render out some fat before adding to a dish, rather than having to get a skillet dirty and browning it. I'd also recommend Colu Henry's Back Pocket Pasta if you're in the mood for pasta. Many of the dishes are quick and easy, though they might push kids' palate's a little bit (such as Linguine with Savoy Cabbage and Salumi), but it sounds like that's what you're looking for. My now-10-yr old has happily eaten everything we've made from it (except the dishes with cooked spinach).