Chocolate Soufflé with Creme Anglaise

Name: Chocolate Soufflé with Creme Anglaise
Ingredients: 1¾ cup whole milk; ½ cup granulated sugar; 6 large egg yolks; 1 tbsp cornstarch; 1 tbsp pure vanilla extract; FOR THE CHOCOLATE SOUFFLES:; 8 oz good quality bittersweet chocolate, chopped into small pieces; 4 tbsp butter (plus 1 tbsp more for coating the inside of the ramekins); 2 tsp pure vanilla extract; 1/4 tsp salt; 3 large egg yolks; 1/2 cup granulated sugar, divided in half (plus 2 tbsp more for coating the inside of the ramekins); 6 large egg whites; 1/4 tsp cream of tartar