In a large mixing bowl, gently stir together the blueberries, lemon zest & juice, sugar, pinch of salt, cornstarch and flour.

From lemon(s), grate 1 1/2 teaspoons peel and squeeze 1/4 cup juice. In medium saucepan, combine 1 1/2 cups blueberries, 1/4 cup sugar, and 1 tablespoon water.

Preheat oven to 350 degrees. In a bowl, place the blueberries and sprinkle with 1 tablespoon of flour. Toss to coat blueberries with the flour.