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1
Preheat oven to 350F.
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2
Butter 17 1/2x11 1/2x1-inch baking sheet.
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3
Line with parchment paper, allowing 1-inch overhang on all sides.
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4
Butter parchment.
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5
Mix 1/4 cup sugar, cinnamon, allspice and ginger in small bowl.
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Sprinkle over parchment.
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Place kitchen towel on work surface.
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8
Sift powdered sugar over towel.
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9
Combine 1/2 cup sugar, 4 eggs, 3 yolks and extract in large bowl.
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10
Using electric mixer, beat until thick and pale yellow, about 6 minutes.
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11
Sift flour and baking powder over egg mixture; gently fold in.
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12
Using clean dry beaters, beat whites until medium-stiff peaks form.
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13
Fold whites into batter in 2 additions.
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14
Pour batter into prepared baking sheet; spread to edges.
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15
Bake cake until golden and tester inserted into center comes out clean, about 20 minutes.
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16
Invert onto prepared towel.
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17
Peel off parchment.
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Starting at 1 long side, roll up cake in towel.
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Cool.
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20
Pour 2 tablespoons water into small saucepan; sprinkle gelatin over.
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Let soften 10 minutes.
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22
Whisky yolks, 1/2 cup sugar, cornstarch and brown sugar in medium bowl to blend.
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23
Whisk half and half, pumpkin and vanilla in heavy medium saucepan.
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Bring to boil.
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25
Gradually whisk hot pumpkin mixture into yolk mixture.
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26
Return mixture to same saucepan.
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Whisk over medium heat until mixture boils and thicken.
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28
Remove from heat.
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Whisk in orange juice concentrate and orange peel.
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30
Stir gelatin mixture over low heat just until gelatin dissolves.
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31
Remove from heat.
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32
Whisk in 1/2 cup pumpkin mixture; whisk into remaining pumpkin mixture.
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33
Chill until cold and thick, whisking occasionally, at least 6 hours.
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34
(Cake and filling can be made 1 day ahead.
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35
Cover cake with foil; store at room temperature.
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36
Keep filling chilled.)
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37
Unroll cake.
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38
Spread filling over cake; roll up cake, enclosing filling.
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39
Arrange cake seam side down on platter.
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40
Beat whipping cream and 1 tablespoon sugar in large bowl until stiff.
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41
Spoon cream into pastry bag fitted with large star tip.
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42
Pipe in lengthwise rows over roulade.
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43
(Can be made 6 hours ahead.
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44
Chill.)
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45
Garnish platter with orange slices and mint, if desired.