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1
Preheat oven to 350 degrees.
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2
Line a baking sheet with parchment paper.
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3
Butter a 9-by-13-inch baking dish, preferably one attractive enough for serving.
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4
Place the flour, baking powder and salt in a food processor, and whirl briefly to combine.
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5
Dice the butter, add it and pulse until the mixture is uniformly crumbly.
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6
Mix the quarter of a cup sugar and half-and-half together, and pour into the food processor.
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7
Pulse just until the ingredients are combined to form a soft dough.
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8
Do not overmix.
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9
Scoop the dough into eight mounds on the baking sheet, spacing to allow two inches between them.
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10
Sprinkle with the tablespoon of sugar, and bake 20 to 25 minutes, until lightly browned.
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11
While the pastry is baking, combine the berries in a mixing bowl, add the brown sugar, mix gently, then spread in the buttered baking dish.
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12
When the pastry is done, slide each piece off the parchment, and place on the berries, spacing them evenly.
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13
Place the baking dish in the oven to continue baking, until the topping is browned and the berries are bubbling, about 30 minutes.
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14
Allow to cool for about 30 minutes, then serve, with pastry topping on each portion.
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15
Garnish with mint sprigs, and spoon vanilla ice cream on the side.
