Mac N' Cheese Boats | Lazy Cooking

Ingredients

• 4 medium or large zucchini, halved lengthwise
• 1 1/2 tablespoons butter, melted, plus 1 1/2 tablespoons, room temperature, divided
• kosher salt, to taste
• ground black pepper, to taste
• 1 small yellow onion, finely chopped
• 4 cloves garlic, minced
• 3/4 teaspoon smoked paprika
• 1/2 teaspoon ground mustard
• 1/4 teaspoon cayenne pepper
• 1/4 teaspoon ground nutmeg
• 6 ounces elbow macaroni
• 2 1/4 cups whole milk
• 1/4 cup heavy cream
• 2 cups sharp yellow cheddar, shredded
• 1 cup pepper jack cheese, shredded