Strawberry Jam Biscuits

INGREDIENTS

• 12 fresh strawberries, hulled, halved or quartered if large (about 3 cups)
• 1/4 sugar
• 1 finely grated lime zest
• 2 fresh lime juice
• 3/4 sugar
• 2 baking powder
• 3/4 kosher salt
• 2 1/4 all-purpose flour plus more
• 1/2 (1 stick) chilled unsalted butter, cut into 1/2-inch pieces
• 3/4 buttermilk
• 1 large egg, beaten to blend
• 1 raw sugar
• Vanilla ice cream (for serving)