Put the blueberries, brown sugar, 2 Tbsp of flour and lemon juice in the prepared dish. Mix well.
In a bowl, add the ½ cup of flour, oatmeal, brown sugar, cinnamon and salt. Mix well. Add the butter and mash until it is mixed in with oatmeal mixture.
Spread the oatmeal mixture on top of the blueberries.
Bake for about 30 minutes until blueberries are bubbling and topping starts to brown.
Serve with vanilla ice cream.
Recipe by Cook Eat Run at https://cookeatrun.com/2014/08/27/blueberry-crisp/