Combine berries, cinnamon, and lemon juice in a 9 by 13-inch baking pan.
Combine flour, 3/4 cup sugar, and baking powder in medium mixing bowl and stir. Add milk and butter while stirring. Pour mixture over berries until covered.
Combine cornstarch and 1/2 cup sugar in small mixing bowl and stir. Sprinkle mixture over batter.
Remove boiling water from heat and slowly pour over entire pan. Place baking pan into oven and bake for 45 to 50 minutes or until crust is golden brown. Remove from oven, allow to cool slightly, and serve warm.
A viewer or guest of the show, who may not be a professional cook, provided this recipe. It has not been tested for home use.