This Paleo Lemon Blueberry Tart is nothing less than a showstopper. With a light and fluffy shortbread crust, a sweet and tart custard filling, and fresh, plump blueberries to go on top, you can’t go wrong. This tart tastes so sinfully delicious you won’t feel like you’re eating Paleo, gluten-free, refined sugar-free, dairy-free, or clean-eating whatsoever!