Do you have any ideas for au gratin potato recipes?

I have one nearly perfected , my problem is this:





What can I do to make my cheese sauce thick? I use three cheeses (cheddar, jack, and colby), buttermilk, and chix broth.





I have tried corn starch.Do you have any ideas for au gratin potato recipes?
Toss your cheese in some flour. You just want it covered lightly. Also, a little nutmeg works well in the potatoes.Do you have any ideas for au gratin potato recipes?
Just add less liquid and I add a little flour...oh....add ham sometimes.Your recipe sounds like a good one.Sometimes I add just a little Gouda cheese.
Potato %26amp; Onion Gratin





Ingredients





Serves 4 鈥?6





2 lb new potatoes halved lengthways


300 ml (陆 pint) double cream


90g (3 oz) parmesan cheese


Salt and ground black


125 g Taleggio cheese sliced *


2 tablespoons oil


1 bunch spring onions, chopped


1 large red onion, peeled and chopped


2 cloves garlic, peeled and chopped





* taleggio is a soft Italian cheese it can be substituted with brie, camembert or mozzarella





Method:





1. Heat the oven to 200 oC or mark 6


2. Cook the potatoes in salted water for 5 mins and drain well


3. Place potatoes in an ovenproof dish.


4. Pour the cream over and add half the parmesan and toss well and season


5. Arrange the taleggion slices over the top. Cover with foil and cook for 20 25 mins.


6. Heat the oil and fry the onions and garlic for 2 -3 mins until just starting to soften, but so they retain their colour.


7. Remove foil and stir in the onions and sprinkle with the rest of the parmesan.


8. Leave uncovered and cook for a further 10 -15 mins until bubbling and golden brown.