1. Heat oven to 375f.
2. Line base of 8" round tin or small square tin with baking parchment.
3. Melt butter and stir in the egg yolks and mustard. Mix well.
4. Add Quaker oats, pepper and cheese and mix in well. Press mixture in tin.
5. Bake for about 35 minutes or until golden brown.
For round tin, use pastry cutter and stamp out a circle, then cut six even pieces.
For square tin, cut into six/eight fingers.