This isn't a "traditional" butter tart recipe, but I thought I'd send it anyway since it sounds to yummy. I'm sure our lemon-toed list member will like it anyway... :) This recipe is "untried" but I got it from The Monarch Flour Canadian Recipes Cookbook, although I must say, none of the recipes strike me as being particularly "Canadian".... I'm going to assume that you (or anyone else) already has a recipe for pastry and omit that part, however, I can post the pastry recipe if someone needs it although it looks pretty standard.

Preheat oven to 375. Prepare pastry; roll out half. [the recipe doesn't say what to do with the other half, just use it in something else, I guess?] Cut with a floured cookie cutter [I assume it means a round one...the book is pretty old] and line 15 medium-sized muffin cups. Do not prick.

Stir together butter or margarine, granulated sugar, and corn syrup. Blend in eggs and lemon juice and rind.

Fill pastry lined tart shells 2/3 full. Bake in preheated oven for 20 to 25 minutes.