I love to make this when blueberries are in season.
Preheat oven to 350°.
Place blueberries in a 9x13 baking pan; sprinkle with lemon juice and vanilla extract.
Combine sugar, flour, cinnamon, and nutmeg and sprinkle over berries and toss lightly.
Combine topping ingredients and crumble evenly over berries.
Bake at 350° for 45 minutes.
Serve warm with vanilla ice cream.
Recipe may be halved and baked in a 9 x 9 square pan.
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