Cook first 3 ingredients in a large saucepan over medium-high heat, stirring constantly, until cheese melts. Remove from heat.
Beat egg yolks until thick and pale. Gradually stir about one-fourth of hot mixture into egg yolks; stir into remaining hot mixture. Stir in breadcrumbs, salt, and pepper.
Beat egg whites until stiff peaks form; fold into yolk mixture. Spoon into a 1-quart souffle dish.
Bake at 325° for 50 minutes or until puffed and golden.