Prep the oven: Heat to 400°F (200°C). Line a rimmed baking sheet with parchment.
Roast the strawberries: Toss berries with 1/3–1/2 cup sugar, lemon zest, and 1 teaspoon lemon juice.
Spread in a single layer. Roast 18–22 minutes until juicy and slightly caramelized. Cool to thicken.
Mix dry ingredients: In a bowl, whisk flour, baking powder, 2 tablespoons sugar, and salt.
Cut in butter: Grate or cube cold butter and work it into the flour with your fingertips or a pastry cutter until pea-sized crumbs form.
Add cream: Stir in 1 cup heavy cream just until a shaggy dough forms.
Do not overmix.
Shape and cut: Turn dough onto a lightly floured surface. Pat into a 3/4-inch thick slab. Fold the dough in half once for layers, pat again, and cut 6–8 rounds or squares.
Bake biscuits: Place on a parchment-lined sheet, close but not touching.
Brush tops with cream and sprinkle a little sugar. Bake 12–15 minutes, until golden. Cool slightly.
Make vanilla bean cream: Split the vanilla bean and scrape seeds into a cold bowl.
Add 1 cup heavy cream and powdered sugar. Whip to soft peaks. Add a pinch of salt and adjust sweetness to taste.
Assemble: Split warm biscuits.
Spoon roasted strawberries and their syrup over the bottom, add a generous dollop of vanilla bean cream, and cap with the biscuit top. Spoon more berries and syrup over, if you like.
Serve: Best enjoyed warm, with extra cream and sauce on the side.