6 servings

How to Make It

Step 1

Melt butter in a heavy saucepan over low heat; add flour, whisking until smooth. Cook, whisking constantly, 1 minute. Gradually add half-and-half; cook over medium heat, whisking constantly, until thickened and bubbly.

Step 2

Whisk egg yolks until thick and pale. Gradually stir about one-fourth hot mixture into yolks; stir into remaining hot mixture. Stir in squash, salt, and nutmeg.

Step 3

Beat egg whites at high speed with an electric mixer until stiff peaks form; fold one-fourth of egg whites into squash mixture. Fold in remaining egg whites; pour into a lightly buttered 2-quart souffle dish.

Step 4

Bake at 350° for 1 hour or until puffed and brown.

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