Haha!! I'm not saying they are
the secret, but they certainly help me! I feel so full after one too. I think it's because of the oats, being low GI and all that. Anyway, here is my recipe. I've adapted it from the original, which I'll also post. Apparently, it's the combination of rolled oats and the peanut butter. Adding fat/oil lowers the GI rating to any food. Hubby back into his body building and doing tons of research.
My version:
150g peanut butter (try to use whole nut or organic. Ideally ingrediants should be nuts, palm oil and sea salt, no sugar. Crunchy also works better)
3 tbsp honey
60g raisins (or any other dried fruit)
200g rolled oats (I use Holland & Barrats Muesli base)
2 eggs whites, beaten
1 heaped teaspoon cinnamon
3 tsp Fibre Sure (fibre supplement made from Inulin)
Knob of REAL butter!
Melt the peanut butter in the microwave for about a minute. Add to the rest of the ingrediants and mix well. Spoon into a lined baking sheet, press down, and cook on 170 for about 20 minutes.
Cut as soon as possible after taking out of the oven. Leave to cool on the greaseproof paper on a cooling rack. I get 14 bars out of mine, I use a slighty smaller baking sheet than the average one.
Have been adapting for weeks now, and find this is the best combination to keep them moist, and for them to bind properly.
This is the original recipe:
150g peanut butter
2 tbsp honey
250g dried mixed fruit, finely sliced (I reduced mine to 60g as not a big fan!)
200g oats
2 egg whites, beaten
(Makes 16 squares)
Information (per square) for original recipe:
Energy 155kcal
Protein 4g
Carbohyfrate 22g
Fat 6g
Maybe not the best for CC'ing, but all good things in there and they are de-lish!!

Let me know if you try them.