Preheat the oven to 190°C.
Add Loprofin Baking Mix and baking powder to a large bowl, rub in the butter until the texture resembles coarse breadcrumbs.
Slowly add enough water to make a soft, manageable dough.
Place the pastry mixture on a sheet of greaseproof paper and lightly knead for 30 seconds until a smooth dough forms.
Roll out the dough on the greaseproof paper and cut into circles to line 12 tartlet tins.
Blind bake in a preheated oven for 10-12 minutes.
When cooled, spoon 1 tbsp custard into each tartlet (see Custard Recipe).
Halve the strawberries and place on top of each tart and cover with strawberry jam warmed in the microwave.