One of the biggest factors in cooking good food is using good food to cook. This is a point we stress over and over, with every kid that comes through our cooking program.  Not expensive food, not even "fancy" food (though that can be a lot of fun when you can swing it), but good, real, recognizable food. Start small, instead of buying that can of diced tomatoes, buy three Roma tomatoes (about the same price), dice them in a bowl, and sprinkle a little salt and sugar on them.  10 minutes later you'll have the same, but far superior tasting ingredient: diced tomatoes in juice...and really, was it that hard? (...and it doesn't taste like the can!) And I'm not even going to bring up the subject of the health benefits of freshly made food, vs. pre-packaged.    Simple SauceNow, let's take that one tiny step further...now that you have your diced tomatoes, is it really that much harder to dice up an onion, chop a little garlic, and squirt some olive oil in a pan? Saute (that means a low fry in a…