Brussels Sprouts Casserole

Ingredients (15)

• For the topping:
• 1/2 cup panko
• 1/4 cup Parmesan cheese
• 1 teaspoon lemon zest
• Salt and pepper,
• For the brussels sprouts:
• 5 strips bacon
• 2 lbs brussels sprouts,
• 1/2 red onion
• 4 cloves garlic,
• 1/2 teaspoon fresh thyme
• 1 1/4 cups heavy cream
• Kosher salt and black pepper,
• 3/4 cup shredded Gruyere cheese
• 1/4 cup shredded mozzarella cheese