Bottega Pistho
The jam tart forgives less than it looks. Four ingredients, a short method — and precisely for that reason every mistake shows: the rim that shrinks, the soggy base, the jam bubbling out between the strips. All three are avoidable with steps that add no time.
Ingredients for a 24 cm tart
- 300 g plain flour
- 150 g cold butter, cubed
- 120 g sugar
- 1 whole egg + 1 yolk, straight from the fridge
- A pinch of salt and the grated zest of half a lemon
- 350 g preserve (see below for which)
The pastry, in five minutes
Rub cold butter into the flour with your fingertips until you have coarse crumbs. It must not turn creamy: if the butter warms, the pastry slumps in the oven.
Add sugar, salt and zest, then the eggs. Work it as little as possible, just until it holds. Every extra minute develops gluten, and gluten is why the rim shrinks during baking.
Flatten into a disc, wrap and refrigerate for at least an hour. This step cannot be skipped: resting relaxes the gluten and firms the butter, and those two things are what hold the shape.
A dry base: two ways
A soggy base comes from moisture in the preserve soaking into raw pastry. Two solutions, both effective.
- Blind baking — bake the empty shell at 180 degrees for fifteen minutes with paper and weights, then fill and finish. The safest method.
- The barrier — scatter two tablespoons of semolina or crushed dry biscuits over the raw base before the jam. They absorb the moisture and you will not taste them.
Baking
Roll out two thirds of the pastry to half a centimetre, line the tin, prick the base. Fill leaving a centimetre clear of the rim — jam expands in the oven and without that margin it escapes. Cut the remaining pastry into strips for the lattice.
Conventional oven, 180 degrees, 35 to 40 minutes, until the lattice is golden and the rim pulls away slightly. Cool completely in the tin: while hot the jam is liquid and slices collapse.
Which preserve, and how it behaves
- Fig — dense and sweet, holds beautifully. The easiest for a first tart.
- Blood orange — sharp, cuts the butter in the pastry. Runnier: use the semolina barrier.
- Prickly pear — delicate and low in acidity. Best with a less sweet pastry, or it disappears.
- Apricot — the classic. Balanced between sweet and sharp, predictable behaviour.
- Pear — very delicate. Works better mixed, with a little grated lemon in the filling.
One thing that matters: preserves with a high fruit percentage contain more water and less sugar, so they stay looser in the oven. That is not a defect, but with those the base barrier becomes close to essential.
Keeping it
Out of the fridge, covered with a cloth, three or four days. Refrigerated, the pastry absorbs moisture and turns rubbery within a day.
