Baked Spinach and Artichoke Toasts

Ingredients (14)

• + 1 loaf French bread add to pantry
• + ¼ cup unsalted butter, melted add to pantry
• + 1 (8 ounce) package cream cheese, at room temperature add to pantry
• + ½ cup grated Gruyere cheese add to pantry
• + ½ cup grated provolone cheese add to pantry
• + ¼ cup finely grated Parmigiano-Reggiano cheese, plus more for topping add to pantry
• + 3 cloves garlic, finely minced add to pantry
• + ⅓ cup thinly sliced green onion, white and light green parts only add to pantry
• + ½ teaspoon salt, or to taste add to pantry
• + freshly ground black pepper to taste add to pantry
• ✓ 1 pinch cayenne pepper
• + 1 pinch freshly grated nutmeg add to pantry
• + 1 (10 ounce) package frozen chopped spinach - thawed, drained, and chopped add to pantry
• + 2 cups chopped marinated artichoke hearts add to pantry