1. Heat oven to 400°F.
2. In large bowl, beat eggs with whisk. Beat in milk. Beat in flour and salt until smooth.
3. Generously grease 12 regular-size muffin cups with reserved bacon drippings. Place muffin pan in oven 5 minutes. Carefully remove pan from oven. Divide batter evenly among muffin cups. Sprinkle bacon evenly over batter in muffin cups.
4. Bake 25 to 30 minutes or until deep golden brown. Prick top of each popover once with sharp paring knife to prevent deflation. Sprinkle cheese evenly over popovers. Let stand 3 to 5 minutes or until cheese is melted.