Instructions: Saute chopped onions in butter in a medium skillet over medium heat, stirring constantly, until tender. Spoon into a lightly greased 13- by 9- by 2-inch baking dish.

Combine cheeses, reserving 1/2 cup cheese mixture for topping. Sprinkle remaining cheese mixture over leeks.

Combine eggs, whipping cream, tarragon, salt and pepper in a bowl, stirring with a wire whisk until blended. Pour egg mixture over leek mixture.

Bake, uncovered, at 375 degrees for 30 minutes or until set and lightly browned. Sprinkle with reserved cheese mixture; bake and additional 5 minutes or until cheeses melt. Garnish, if desired. Serve immediately.

This recipe yields 8 to 10 servings.

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