Combine 1/2 tsp salt with the pepper, garlic powder, smoked paprika, and cumin. Rub the seasonings evenly all over the pork tenderloin. Heat an oven-safe skillet over medium-high heat and add in 1 tbsp of olive oil.
Once skillet is hot add the pork tenderloin and sear on each side for 3-4 minutes, making sure all sides are browned.
Place the skillet into the oven (or if you're using a non oven safe skillet, transfer to a baking dish) and cook for an additional 10 minutes. Or until the internal temperature of the pork reaches 145 degrees.
For The Mango Salsa
Combine the mango, onion, serrano pepper, tomato, cilantro, lime juice, salt and honey in a large bowl. Stir until all flavors and ingredients are combined.
Remove pork tenderloin from the oven and let sit for 10 minutes before cutting into. Cut into 1/2 in thick slices and enjoy with the mango salsa on top.