Butter your microwave dish (see notes) so the flapjacks don't stick and set aside.
Add your vegan butter or spread and golden syrup to a microwave-safe bowl and microwave for about 1 minute, maybe less until melted.
Add the flour, oats, brown sugar and salt to a large mixing bowl and mix well.
Pour the melted butter and syrup into the oaty mixture and mix until well combined.
Spoon just over half of the flapjack mixture into your buttered dish and press down with the back of a spoon until well compacted and with an even surface.
Add the dollops of jam and spread out across the flapjack base.
Crumble the rest of the flapjack mixture evenly across the jam layer and use the back of a spoon to press flat into an even layer.
Bake in the microwave for 4 minutes, leave to sit for 2 minutes then bake for another 3 minutes (see notes about microwaves).
Leave to cool, then cut and serve.
Enjoy!
Notes
Use a microwave-safe dish - ceramic, glass or plastic.
The square glass dish I use is 20cm x 20 cm (about 8 inches x 8 inches) and the small ceramic dish is 23cm x 16 cm (9 inches x 6 inches). A bit bigger or smaller is fine.
Microwaves come in all shapes and sizes, each with a different power. Mine is 800 watts. If yours is a higher wattage, you may want to take the flapjacks out a minute or so early. If your microwave is less powerful, the flapjacks may need an extra minute or two.
You can cut them into smaller pieces if you are worried about calories.
Keep them in a cake tin or in an airtight contaimer in the fridge for a few days.