Pimento Cheesy Mac

Ingredients

• kosher salt
• 1 lb macaroni or 1 lb any short-cut pasta or 1 lb whole wheat short-cut pasta
• 4 tablespoons butter
• 1 clove garlic, finely chopped
• 14 cup grated onion
• 3 tablespoons all-purpose flour
• 2 cups milk, room temperature
• 1 12 teaspoons paprika (1/2 palmful)
• 1 teaspoon dry mustard (1/3 palmful)
• freshly ground black pepper
• 2 cups shredded sharp cheddar cheese
• 1 (4 ounce) jar chopped pimiento, drained