Fry bacon on low until slightly crispy; remove bacon to a paper towel leaving the bacon grease in the pan. Sauté shallots and jalapeno in the bacon grease over medium heat until soft, about 2 minutes. Add blueberries, sugar, vinegar, mustard, garlic powder, salt, lemon juice and cooked bacon. Simmer until blueberries have split and sauce thickens slightly, about 3 minutes.
3 slices thick cut bacon, diced , 1/2 cup minced shallots, 1 jalapeno, seeded and minced, 2 cups fresh blueberries, 1/2 cup packed golden brown sugar, 1/4 cup balsamic vinegar, 1 tbsp Dijon stone ground mustard, 1/2 tsp garlic powder, 1/2 tsp kosher salt, 2 tbsp fresh lemon juice
Transfer mixture to a blender or food processor; pulse until pureed. Return sauce to pan so you can warm it slightly when the meat comes out of the oven.
For the pork, remove the silver skin, if any, from the pork tenderloin and season the meat generously with salt and freshly ground pepper.
2- (1.25 lbs) pork tenderloins, silverskin removed , kosher salt, fresh ground pepper
Preheat oven to 425 degrees F. Heat a large oven proof skillet (if you don't have an oven proof skillet use a regular one, you will just have to transfer pork to a baking tray or dish for the oven) over high heat, then add oil. Add pork and sear on all sides, turning meat with tongs, about 2 minutes total on each side.
1 tbsp olive oil
Place meat thermometer in the thickest part of the tenderloin and place skillet or baking tray into the oven. Cook until thermometer reads 145 degrees F.
During the last 5 minutes of cooking (or when pork is at 130 degress F), brush a little of the blueberry sauce on the tops of the tenderloins, just enough to adhere to the meat. Serve the rest of the sauce on the side.
Remove tenderloins from the oven and let rest 3 minutes before slicing.