Pimiento Cheesy Mac

Ingredients

• Kosher salt
• 1 pound macaroni or any short cut pasta or whole-wheat short cut pasta
• 4 tablespoons butter
• 1 clove garlic, grated or finely chopped
• 1/4 cup grated or very finely chopped onion
• 3 tablespoons all-purpose flour
• 2 cups milk, room temperature
• 1 1/2 teaspoons paprika, 1/2 palmful
• 1 teaspoon dry mustard, 1/3 palmful
• Freshly ground black pepper
• 2 cups shredded yellow extra-sharp Cheddar
• 1 (4-ounce) jar chopped pimiento, drained