These are very simple, and I think the way to make them most fun is to use a wide selection of ﬁllings, so that your friends at the picnic or kids at the party can pick which one they want.
They also look a lot prettier when you have a whole selection of colours.
200g self-raising ﬂour, plus extra for dusting
a pinch of salt
1 egg yolk
75g caster sugar
a jar of jam (or jams!) of your choosing
Step 1: Sift the ﬂour into a bowl, add the salt, then rub in the butter with your ﬁngers until you have a nice crumbly mixture.
Step 2: Mix in the egg yolk and caster sugar with a wooden spoon until you have a dough – add occasional splashes of water, as needed, until the dough is well combined.
Step 3: Put the dough into the fridge for about 15 minutes and heat the oven to 200°C/gas mark 6 in the meantime.
Step 4: Roll the dough out on a lightly ﬂoured surface and cut out little circles. Put them into lightly greased tart tins and prick them in a few places with a fork.
Step 5: Put a generous blob of jam into the tarts, so they are about three-quarters full. You can use any kind of jam you fancy, and it is probably nicest to use a few different kinds.
Step 6: Roll out the leftover dough and cut out little stars or any other shapes you fancy. Place these on top of the jam. Put your little beauties into the oven for about 20 minutes, until the pastry is golden and the jam is bubbling hot. Let them cool on a wire rack before you get stuck in.