Here's proof you don't have to make fancy tart shells to indulge in Canada's glorious butter tart goodness. These squares are still ooey gooey, yet come with the benefits of juicy Ontario apples.
Base: In large bowl, stir flour and sugar together. Cut in butter with pastry blender or 2 knives, then work with your fingers until crumbly. Press evenly into buttered 13- x 9-inch (3 L) metal baking pan. Bake in 325°F (160°C) oven for about 20 minutes or until pale golden. Remove from oven.
Topping: Meanwhile, in large bowl, using an electric mixer, beat butter with sugar until creamy. Beat in eggs, maple syrup, vanilla and salt. Stir in apples and raisins.
Spread evenly over warm base. Return to oven; bake for 30 to 35 minutes, until golden brown on top and set in the centre. Transfer to wire rack and run a knife around edges to release while warm. Cut into squares and serve warm or at room temperature. Store at room temperature up to a day. Cover and refrigerate up to 3 days or freeze up to 3 months.