Grease your baking dish well so the flapjacks don't stick.
Add the butter, lemon juice, lemon zest and golden syrup to a microwaveable bowl.
Microwave for about 1 minute until the butter has melted. Set aside.
Add your flour and oats to a large mixing bowl.
Next, add the brown sugar and salt and give it a good mix to combine.
Pour the melted butter mixture into the dry ingredients and mix well until all the butter has been absorbed.
Spoon just over half the flapjack mixture into your prepared dish and pack firmly by pressing down the mixture with the back of a spoon until firm and smooth.
Dollop jam onto the firmly packed flapjack base and spread evenly to cover the surface of the flapjacks.
Crumble the rest of the mixture evenly across the top and once more press down firmly with a spoon, don't worry if some of the jam shows through, it looks rather appealing.
Bake in the microwave (see notes below) for 4 minutes, allow to rest for 2 minutes, then microwave for another 3 minutes until golden brown.
The oat bars should be soft and springy to the touch for the most delicious, chewy flapjacks.
Once cool, cut into bars
.Serve and enjoy!
Notes
You can cut the bars into 12 pieces for a lower calorie snack.
You can change the flavour of the jam too!
My microwave is 800 watts, if yours is more powerful the flapjacks will need a little less time and if it is less powerful, they will need a little longer. They should be springy but cooked to the touch.
Store in an airtight container in the fridge for 4-5 days.