Make Ahead Tip: The torte will keep, covered, in the refrigerator for up to 2 days. Reheat, covered, in a 350°f oven.
Tip: To clean leeks: Trim and discard coarse green tops. Split leeks lengthwise with a sharp knife, beginning about 1 inch from the root end and cutting toward the green end. Leave root end attached. Swish leeks repeatedly in a basin of cold water to remove grit. Alternatively, trim roots and ragged tops. Slice leeks and place in plenty of water, then drain. Repeat a few times. The slices do not absorb water or lose flavor and the process is faster.
2 starch, 1/2 fat