Brussels Sprout and Bacon Grilled Cheese

INGREDIENTS

• Freshly ground pepper
• 6 Brussels sprouts, thinly sliced
• 6 ounces port-salut cheese, sliced
• 1 tablespoon unsalted butter, plus more if needed
• 1/2 teaspoon grated lemon zest
• 4 thick slices country white bread
• 3 slices thick-cut bacon, cut into 2-inch pieces