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Preheat an oven to 400 degrees F (200 degrees C).
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Place the bacon in a large, oven-safe skillet, and cook over medium-high heat, turning occasionally, until lightly browned and still flexible, 6 to 7 minutes.
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Drain the bacon slices on a paper towel-lined plate. Remove any excess bacon grease from the skillet.
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Combine garlic powder, seasoning salt, basil, and oregano in a small bowl. Set aside.
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Wrap the pork tenderloin with the bacon strips securing with 1 or 2 toothpicks per strip of bacon
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Slice the tenderloin between each bacon strip to create the medallions.
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Dip both sides of the medallions in seasoning mix.
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Melt butter and oil together in the same skillet over medium-high heat.
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Cook each medallion for 4 minutes on each side
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Place skillet into the preheated oven and bake until the pork is no longer pink in the center, 17 to 20 minutes. An instant-read thermometer inserted into the center should read 145 degrees F (63 degrees C).