Preheat oven to 450°F.
To a small bowl, add ¾ cup of strawberries. Toss with 2 tablespoons of sugar. Set aside.
In a medium bowl, whisk the flour, baking powder, and the remaining tablespoon of sugar together.
Pour in the buttermilk. Stir until mostly combined, being careful not to overwork the dough.
Fold in the sugar-coated strawberries, including any liquid from the berries.
Pour the melted butter into an 8×8-inch baking dish. Place the dough on top of the butter. Using a spatula (or your hands), evenly spread the dough out to the edges of the pan.
Score the unbaked dough into 9 squares (3×3 pattern). Top with the remaining ¼ cup of strawberries. Bake for 30-32 minutes, or until the the biscuits are golden brown.
After removing the biscuits from the oven, allow the butter to be absorbed. Let the biscuits cool slightly before adding the glaze (if using).