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1
Butter 9-inch springform pan.
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2
Mix flour, sugar, yeast and salt in processor.
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3
Add butter; using on/off turns, blend until butter is reduced to pea-size pieces.
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4
Add eggs and milk.
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5
Using on/off turns, blend until sticky dough forms.
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6
Using buttered fingertips, press dough onto pan bottom.
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7
Cover with plastic.
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8
Let dough rise in warm draft-free area until doubled in volume, about 1 3/4 hours.
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9
Stir wine and 3/4 cup sugar in medium saucepan over medium-high heat until sugar dissolves and mixture boils.
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10
Add pears.
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11
Reduce heat to medium-low; simmer until pears are tender, about 8 minutes.
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12
Cool mixture 30 minutes.
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13
Using slotted spoon, transfer pears to plate.
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14
Boil wine syrup in pan until reduced to 1 cup, about 4 minutes.
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15
Mix cornstarch and 1 teaspoon water in small bowl; stir into wine syrup.
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16
Cook until syrup thickens and boils, whisking occasionally, about 1 minute longer.
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17
Set sauce aside.
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18
Position rack in top third of oven; preheat to 400F.
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19
Starting at edge of pan and leaving 1/2-inch plain border, arrange pear slices close together in concentric circles on dough.
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20
Sprinkle pears and dough edge with 2 tablespoons sugar.
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21
Bake tart until edge is brown, pears are tender and crust is cooked through, about 30 minutes.
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22
Transfer to rack; release pan sides.
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23
Cool at least 15 minutes.
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24
Cut tart into wedges; place on plates.
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25
Serve with sauce and creme fraiche.