Photo: Tara MaxeyYou can find Heirloom Carrots at farmer's markets here in Southern California all year long. These here are from Windrose but we get most of ours from Mc Grath Farm. The darker varieties, although more striking to look at, have a more bitter taste yet according to Jo Robinson contain a higher nutritional value than their sweeter counterparts as is the case with most "wild" produce. So let's do something easy to get these prettier, healthier carrots on our dinner table.ROASTED CARROT SALAD:Take a large bunch of carrots and trim all but 1" of their stalk (the ones pictured…