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1
Combine first 5 ingredients in heavy large saucepan and whisk to blend.
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2
Add butter.
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3
Whisk over medium heat until filling thickens and leaves path on back of spoon when finger is drawn across, about 13 minutes (do not boil).
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4
Mix in half and half and vanilla.
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5
Whisk until filling is very thick and smooth and just begins to bubble, about 6 minutes.
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6
Transfer to bowl.
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7
Cool 15 minutes, stirring occasionally.
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8
Cover; chill until very cold, about 4 hours.
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9
(Can be made 3 days ahead.
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10
Keep chilled.)
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11
Mix flour, powdered sugar and salt in processor.
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12
Add butter and shortening and process using on/off turns until mixture resembles coarse meal.
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13
Add 5 tablespoons water and process until moist clumps form, adding more water by teaspoonfuls if dough is dry.
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14
Gather dough into ball; divide into 2 equal pieces.
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15
Flatten into disks.
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16
Wrap in plastic and chill until firm, about 1 hour.
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17
(Can be made 1 day ahead.
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18
Keep chilled.)
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19
Preheat oven to 375F.
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20
Roll out 1 dough disk on lightly floured surface to 12-to 13-inch round.
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21
Transfer dough to 9-inch glass pie plate.
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22
Trim overhang to 1/2 inch; reserve dough scraps.
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23
Fold edge of dough under and crimp decoratively.
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24
Repeat rolling with second dough disk; put into another 9-inch glass pie plate.
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25
Freeze until firm, about 10 minutes.
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26
Line crusts with foil; fill with dried beans or pie weights.
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27
Bake crusts until sides are set, about 20 minutes.
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28
Remove foil and beans.
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29
Continue to bake until crusts are pale golden, piercing with toothpick if crusts bubble, about 12 minutes.
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30
Cool crusts completely on racks.
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31
Maintain oven temperature.
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32
Roll out dough scraps on floured surface to 1/8-inch thickness.
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33
Transfer to baking sheet.
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34
Bake until golden, about 10 minutes.
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35
Cool.
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36
Maintain oven temperature.
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37
Crumble pastry into small pieces; wrap and reserve at room temperature.
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38
Spoon half of filling into each crust.
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39
Bake until filling is set in center, about 18 minutes.
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40
Cool pies.
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41
Chill until cold, about 2 hours.
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42
(Can be made 1 day ahead.
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43
Cover and keep chilled.)
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44
Sprinkle crumbled pastry over pies.
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45
Garnish pies with whipped cream, lemon slices and mint, if desired.