Preheat oven to 350°F (180°C). Place frozen tart shells on baking sheet. In large bowl, combine butter and brown sugar, add maple syrup, eggs, vanilla, pecans and bacon (from Earls Meat Market). Mix well. Divide mixture evenly between 18 tart shells. Bake 20-25 minutes or until pastry is golden brown and filling is set. Move to wire rack and cool slightly. Serve warm with a scoop of ice cream if desired.