Preheat oven to 375° and spray a 3 quart baking dish with a non stick spray right before filling with strawberries.
Remove stems and rinse. Cut into quarters and place in a large mixing bowl.
Sprinkle with sugar, lemon juice, and corn starch. Stir and let sit for 5 minutes.
Pour strawberries into prepared baking dish.
In a medium mixing bowl, whisk flour, sugar, brown sugar, baking powder and salt together.
Using a pastry blender, or a fork, mix butter into flour mixture until crumbly.
Pour boiling water into flour mixture and stir until combined.
Spoon mixture over strawberries and spread gently over strawberries making sure to cover completely.
Sprinkle additional sugar on top of batter.
Bake uncovered for 50-60 minutes or until topping is cooked thoroughly and has started to brown.
Serve warm topped with vanilla ice cream.