Ham & Cheese Oven-Puffed Pancake

Bahan-bahan (4 porsi)

• 3 large eggs
• 1 tablespoon Dijon mustard
• Heaping ½ teaspoon salt
• ¼ teaspoon freshly ground black pepper
• 1 cup all-purpose flour, (spooned into a measuring cup and leveled-off)
• 1¼ cups whole milk ((or substitute ¼ cup/60 ml heavy cream + 1 cup/240 ml skim milk))
• 2/3 cup grated Gruyere cheese
• 1 tablespoon finely chopped fresh chives
• 3 tablespoons unsalted butter
• 5 slices (4 oz) thinly sliced ham, finely diced