Butter a 9-inch deep-dish pie plate and dust with a tablespoon of sugar. Preheat the oven to 350F.Peel and slice the peaches. Toss with the raspberries. Set aside.Blend the sugar, milk, cream, eggs, vanilla, flour and salt in a blender for about a minute or until well blended.
Pour half the custard mixture into the prepared pie plate. Arrange fruit on top and pour the remaining custard over the fruit.
Bake for 45-55 minutes, until the top is golden brown and puffy. Do not overcook. The custard should remain tender.
Serve warm or cold with whipped cream or creme anglaise.