4 Cheese Souffle

Directions

1. 1
   Preheat oven to 350 degrees F.
2. 2
   Saute onion in butter until translucent.
3. 3
   Whisk in flour to form a roux.
4. 4
   Gradually whisk in milk until thickened.
5. 5
   Add cheeses and season.
6. 6
   Remove from heat and beat in yolks.
7. 7
   Allow to cool.
8. 8
   While egg yolks are cooling, beat whites to stiff peak.
9. 9
   Gently fold in whites to cheese mixture.
10. 10
    Add to buttered 1 1/2-quart casserole dish and bake for 35 to 40 minutes.
11. 11
    Serve immediately.