1. Preheat oven to 400°F. Separate biscuits; press into 8 (8-ounce) custard cups, pressing up sides to form crust.
2. Whisk milk and sauce mix in medium saucepan. Bring to boiling over medium-high heat. Reduce heat to medium-low; simmer 1 minute, whisking constantly, until thickened. Stir in chicken and vegetables.
3. Spoon about 1/3 cup chicken mixture into each crust. Place cups on baking sheet. Bake 15 minutes or until golden brown. Top each with cheese and French Fried Onions. Bake 3 minutes or until golden. To serve, remove from cups and transfer to serving plates.