Cut the bacon into 1 inch pieces. Add the bacon to a skillet over medium heat.

Saute for 5 minutes, stirring occasionally, until the bacon has browned.   Remove to a paper towel lined plate.

Remove all but 2 tablespoons of bacon grease from the pan.  Return the pan to medium heat and add the shallot and garlic.  Cook for 1-2 minutes, stirring frequently so that it does not burn.

Add the green beans to the pan and cook for 3-5 minutes or until heated through.

Add the butter, salt, and pepper, and heat until the butter has melted.  

Stir in the bacon and cook for 2 minutes.

Remove from heat and serve immediately.