Strawberry Jam

• 12 ounces fresh strawberries, hulled, halved or quartered if large (about 3 cups)
• 1/4 cup sugar
• 1 tbsp finely grated lime zest
• 2 tbsp fresh lime juice

Biscuits

• 3/4 cup sugar
• 2 tsp baking powder
• 3/4 tsp kosher salt
• 2 1/4 cups all-purpose flour plus more
• 1/2 cup (1 stick) chilled unsalted butter, cut into 1/2-inch pieces
• 1 tsp finely grated lime zest
• 3/4 cup buttermilk
• 1 large egg, beaten to blend
• 1 tbsp raw sugar
• vanilla ice cream (for serving)