Spinach and Feta Stuffed Pork

INGREDIENTS

• 4 tablespoons olive oil
• 1 yellow onion, finely chopped
• 1 16oz package fresh spinach
• 1 pork tenderloin
• 8 ounces feta cheese
• Salt and freshly ground pepper
• 3 tbsp Italian seasoning
• 1 1/2 cup dry white wine
• 1 cup low-salt chicken broth
• Kitchen twine