Make tart shell: Blend together flour, sugar, salt, and butter in a bowl with your fingertips or a pastry blender (or pulse in a food processor) just until mixture resembles coarse meal with some roughly pea-size butter lumps. Beat together yolk, vanilla, lemon juice, and water with a fork, then drizzle over flour mixture and stir with fork (or pulse) until mixture comes together.
Gently knead with floured hands on a lightly floured surface until a dough forms, then gently knead 4 or 5 times. Press into a 5-inch disk. Place in center of tart pan and cover with plastic wrap. Using your fingers and bottom of a flat-bottomed measuring cup, spread and push dough to evenly cover bottom and side of pan. Prick bottom of tart shell all over with a fork and freeze until firm, about 10 minutes.
Preheat oven to 375°F with rack in middle.
Line tart shell with foil and fill with pie weights. Bake until side is set and edge is pale golden, about 20 minutes. Carefully remove foil and weights and continue to bake until shell is deep golden all over, about 20 minutes more. Cool in pan, about 45 minutes.
Make filling while tart shell cools: Stir together strawberries and granulated sugar in a bowl and let stand, stirring occasionally, 30 minutes. Strain in a sieve set over a small saucepan, reserving berries. Add Port to liquid in saucepan and boil until reduced to about 1/4 cup, 10 to 15 minutes. Transfer to a small bowl to cool slightly.
Meanwhile, whisk together mascarpone, confectioners sugar, lemon juice, zest, vanilla, and a pinch of salt until stiff.
Assemble tart: Spread mascarpone mixture evenly in cooled tart shell, then top with strawberries. Drizzle Port glaze all over tart.
Cooks' note: Tart shell can be baked 1 day ahead and kept at room temperature.

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Nutrition Facts

Per Serving Per 100 g

Amount Per 1 Serving
Calories	501 Kcal (2098 kJ)
Calories from fat	281.63 Kcal
		% Daily Value*
Total Fat	31.29g	48%
Cholesterol	101.55mg	34%
Sodium	32.78mg	1%
Potassium	163.99mg	3%
Total Carbs	42.75g	14%
Sugars	24.54g	98%
Dietary Fiber	2.29g	9%
Protein	4.87g	10%
Vitamin C	50.5mg	84%
Vitamin A	0.1mg	4%
Iron	0.3mg	2%
Calcium	88.4mg	9%

Amount Per 100 g
Calories	217.77 Kcal (912 kJ)
Calories from fat	122.42 Kcal
		% Daily Value*
Total Fat	13.6g	48%
Cholesterol	44.14mg	34%
Sodium	14.25mg	1%
Potassium	71.28mg	3%
Total Carbs	18.58g	14%
Sugars	10.66g	98%
Dietary Fiber	0.99g	9%
Protein	2.12g	10%
Vitamin C	22mg	84%
Vitamin A	0.1mg	4%
Iron	0.1mg	2%
Calcium	38.4mg	9%

* Percent Daily Values are based on a 2000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
Find out how many calories should you eat.

Tastes

salty
savory
bitter
sweet

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