Summer Berry Crumble

This couldn't be easier. It can be made with very little ingredients, and its even kid-friendly if you omit the rum.
Another whim recipe.

1 lb. Fresh Strawberries, hulled
1 lb. Fresh Raspberries
1 tbsp. lemon juice
1 box (12 oz.) Vanilla Wafer Cookies
2 cups white chocolate chips, melted, divided
2 oz. rum
1 tsp. vanilla extract

Preheat the oven to 350 degrees.
Mix the berries together in a bowl with the lemon juice.
Spread one layer of cookies in a 2 1/2 quart baking dish, until the bottom is covered.
Pour 1 cup of melted chocolate over the cookies.
Spread the berries and their liquid next.
Pour on the rum and vanilla extract.
Pour the remaining chocolate onto the berries.
Put the remaining cookies into a plastic bag, and crush with a rolling pin.
Spread the cookie crumbs onto the top of the dessert.
Bake for 35-40 minutes, until the top has set, and is golden brown.
Serve with whipped cream.