Cheesy Mac & Cheese

Ingredients

• 2 cups uncooked elbow macaroni
• 1 tablespoon all-purpose flour
• 1 cup heavy whipping cream
• 1 cup half-and-half cream
• 1/4 cup sour cream
• 1 large egg
• 1/2 teaspoon ground mustard
• 1/2 teaspoon cayenne pepper
• 1/4 teaspoon salt
• 1/4 teaspoon pepper
• 1/8 teaspoon ground nutmeg
• 8 ounces Monterey Jack cheese, cubed
• 8 ounces cheddar cheese, cubed
• 2 cups shredded cheddar cheese