Skillet Gratinate of Summer Tomato and Pork - Lidia

Ingredients

• 2 pounds boneless pork loin, in one piece
• 1 or 2 large, firm beefsteak style tomatoes (about 1-1/2 pounds total)
• 1/2 cup flour or more, for dredging
• 1/2 teaspoon salt
• Freshly ground black pepper
• For the Sauce:
• 4 tablespoons extra-virgin olive oil
• 3 tablespoons soft butter
• 12 fresh sage leaves
• 1/2 cup white wine plus more if needed
• 3/4 cup grated Grana Padano or Parmigiano-Reggiano cheese
• 1/2 cup hot Simple Vegetable Broth or stock, plus more if needed