Cook bacon in a medium nonstick skillet over medium heat until crisp.
Remove bacon from pan; crumble. Reserve 1 tablespoon drippings in pan; increase heat to medium-high.
Add bell pepper and garlic; saut 3 minutes.
Add green onions; saut 1 minute.
Remove from heat; stir in crumbled bacon and Swiss cheese. Divide the bacon mixture evenly among 6 (6-ounce) ramekins or custard cups coated with cooking spray.
Heat 2 cups milk in a saucepan over medium heat to 180 or until tiny bubbles form around the edge (do not boil).
Place Parmigiano-Reggiano and the remaining ingredients in a large bowl; stir with a whisk. Gradually add the hot milk to egg mixture, stirring constantly with a whisk. Divide egg mixture evenly among ramekins.
Place the ramekins in a roasting pan, and add hot water to pan to a depth of 1 inch.
Bake at 350 for 32 minutes or until the center barely moves when the ramekin is touched.