Place the cream, sugar, egg, and almond extract into a bowl together. Beat until well combined.
Place the blueberries into the shell, reserving a small handful. Pour the filling mixture over the top. Sprinkle the reserved berries on top, for a more attractive look.
Bake for 35-40 minutes, watching for a deep golden color around the edge. It's wise to put a sheet pan on the rack below the tart to catch any drips.
Remove from oven and allow to cool completely before sliding the tart out of the pan ring.