Separate eggs and let come to room temperature. Preheat oven to 350°F. Lightly beat egg yolks and add cream, onion salt, white pepper and lightly beat again to combine. Set aside.
Fry bacon until crisp and drain on paper towel. Cool and crumble 2 strips into fine pieces.
Butter ramekins and set aside. Beat egg whites to form soft peaks. Add ⅛ teaspoon onion salt, optional. Continue beating to form stiff peaks. Fold in chives and crumbled bacon pieces into egg whites.
Place 1 tablespoon butter in center of buttered ramekins. Divide egg yolk mixture between ramekins. Add 1 tablespoon cheese on top of each yolk mixture.
Spoon egg white mixture equally over top of yolk mixture in each ramekin, mound with peaks.
Cut remaining 2 bacon strips in half and pierce whites with bacon leaving ⅔ of each strip showing.
Bake 5 to 7 minutes, or until lightly browned. Serve immediately.