Marinate the Pork: In a medium bowl, combine the cubed pork tenderloin, maple syrup, sage, garlic powder, onion powder, black pepper, and salt. Mix well to ensure the pork is evenly coated. Let it marinate for at least 30 minutes (or up to 2 hours in the fridge for deeper flavor).
Sauté the Vegetables: In a large skillet over medium heat, add 2 tbsp of olive oil. Once hot, add the sliced onion and red bell peppers. Sauté for about 5-7 minutes until the vegetables are softened and slightly caramelized. Remove the vegetables from the skillet and set aside.
Cook the Pork: In the same skillet, add the marinated pork cubes to the remaining oil (if necessary). Cook over medium-high heat for about 6-8 minutes, stirring occasionally, until the pork is browned and cooked through (internal temperature should reach 145°F).
Combine and Simmer: Return the sautéed onions and peppers to the skillet with the cooked pork. Add the baby spinach, chicken broth, and balsamic vinegar. Stir everything together and cook for an additional 3-4 minutes until the spinach wilts and everything is heated through.
Garnish and Serve: Remove the skillet from heat. Garnish with fresh sage leaves. Serve hot and enjoy your Maple Sage Pork Cuadrado Skillet with a side of rice or crusty bread to soak up the delicious juices.
Notes
For deeper flavor, marinate the pork in the fridge for up to 2 hours.