Cook bacon in a large skillet over medium-high heat 8 to 10 minutes or until crisp; remove bacon, and drain on paper towels, reserving 2 Tbsp. drippings. Crumble bacon; set aside.
Stir together reserved bacon drippings, potatoes, next 5 ingredients, and 2 cups Cheddar cheese in a large microwave-safe bowl. Microwave at HIGH 4 minutes. Stir in sour cream and chiles until well blended.
Spoon potato mixture into a lightly greased 13- x 9-inch baking dish.
Sprinkle evenly with bacon and remaining 1 cup Cheddar cheese. Arrange pork evenly over cheese.