Strawberry Shortcakes

Name: Strawberry Shortcakes
Ingredients: Berries:; 1 quart berries, hulled and sliced (can be done the night before); 1/4 cup sugar; 1 lemon; Biscuits (can be measured ahead of time):; 2 cups all-purpose flour, plus more flour for the work surface; 3 tablespoons sugar, plus more for sprinkling; 1 tablespoon baking powder; 1/2 teaspoon salt; 1 1/2 cups heavy cream, plus more for brushing; Zest and juice from 1/2 lemon; Whipped cream:; 1 1/2 cups heavy cream; 1/3 cup sugar; 1 teaspoon vanilla extract; Fresh mint, for optional garnish