Preheat oven to 350°F. Lightly butter 6-cup souffle dish. Coat dish with breadcrumbs. Whisk cream, egg yolks, salt and pepper in large bowl to blend. Melt butter in heavy large saucepan over medium heat. Add flour and stir constantly until mixture is golden, about 3 minutes. Gradually whisk in cream mixture. Whisk until mixture boils and thickens,about 4 minutes. Add 1 cup cheese and dill and stir until cheese melts. Transfer to large bowl. Beat whites and cream of tartar in another large bowl until medium-stiff peaks form. Stir 1/4 of whites into cream mixture to lighten. Fold in remaining whites. Transfer mixture to dish. Sprinkle 1/4 cup cheese over. Bake until dark golden brown crust forms on top, about 40 minutes.Serve immediately.