- 3 cups fresh blueberries
- 2 tablespoons freshly-squeezed lemon juice
- 2/3 cup brown sugar
- 1/2 cup all-purpose flour
- 1/2 cup oats (can use quick-cooking or old-fashioned)
- 1/3 cup butter, very soft or melted
- 3/4 teaspoon ground cinnamon
- 1/4 teaspoon salt
- vanilla ice cream for serving