3 cups fresh blueberries (picked over)
3 tablespoons unsalted butter
1 3/4 cups half & half
2/3 cup unbleached all-purpose flour
1/2 cup Sugar (plus 2 tablespoons for topping)
1/4 teaspoon salt
3 large eggs (lightly whisked)
1 tablespoon pure almond extract
  grated zest of 2 lemons