Good-Cooking - Chicken, Potato and Pepper Stew

Ingredients

• 1 tablespoon olive oil
• 1 (3 pound) chicken, cut into serving pieces
• Coarse salt and freshly ground black pepper
• 1 1/2 pounds yellow-fleshed potatoes, peeled and cut into large chunks
• 4 tablespoons (1/2 stick) unsalted butter
• 3 red bell peppers, cored, seeded, and coarsely chopped
• 3 ripe plum tomatoes, coarsely chopped
• 1 cup dry white wine
• 1 cup chicken stock or broth
• Pinch of saffron
• 1 teaspoon grated orange zest
• 2 1/2 to 3 pounds spinach, stems removed and well washed