1. Preheat the oven to 190C/gas mark 5. Grease a shallow 30cm x 25cm baking tray with the sunflower oil.
2. Melt the butter, golden syrup and Demerara sugar in a small saucepan, being careful not to let it brown.
3. Place the Cheerios in a mixing bowl, then add the melted butter mix and mix well. Stir in the sunflower and pumpkin seeds.
4. Tip the mixture into the greased baking tray and press down flat. Bake in the oven for approximately 10 minutes. The mixture should be slightly brown at the edges when ready.
5. Cut into approximately 16 slices whilst still warm and slightly soft and leave to cool on a wire rack.
Tana Ramsay's tip:
Try adding nuts as well as seeds for that added crunch - I like to use walnut pieces.