Creamed Spinach Mac & Cheese - My Homemade Recipe

Ingredients

• 1 pound elbow macaroni
• Salt, for pasta water
• 3 tablespoons unsalted butter
• 1 small onion, finely chopped
• 2 cloves garlic, minced
• 3 tablespoons all-purpose flour
• 2 cups whole milk
• 1 cup heavy cream
• 1/2 teaspoon ground nutmeg
• Freshly ground black pepper, to taste
• 1 (10-ounce) package frozen chopped spinach, thawed and drained
• 4 cups shredded sharp cheddar cheese
• 1 cup grated Parmesan cheese
• 1 teaspoon mustard powder (optional)
• 1/2 cup panko breadcrumbs (optional)