Preheat the oven to 400°F. Spray a 10-12-inch pan with non-stick spray
Make the biscuits
In a food processor, combine the flour, baking powder, and butter. Pulse until the mix clumps together to form larger pea-size balls. Drizzle in the buttermilk until the dough is "shaggy" looking. The dough will be a little dry.
Turn the dough out onto wax paper or parchment paper and pat into a 1-inch thick square. Fold the paper around it and place in the freezer while you prep the strawberries.
For the strawberries
Meanwhile, make the filling. In your 10-12-inch baking dish, toss together the strawberries, brown sugar, cornstarch, amaretto, water, and vanilla.
Remove the biscuits from the freezer, brush with melted butter, and sprinkle with cinnamon sugar. Cut into 1-inch squares and arrange the biscuits on top of the strawberries.
Place the dish on a baking sheet. Bake for 45 to 50 minutes, until golden on top. Let cool for 5 minutes. Serve warm or at room temp with ice cream.
Notes
Melt 2 tablespoons of butter and brush the tops of the biscuits with the butter. I used about 2 tablespoons of granulated sugar and 1/2 teaspoon ground cinnamon to sprinkle over the butter.