Seriously the Best Homemade Mac and Cheese | Tasty Kitchen: A Happy Recipe Community!

Ingredients

• 4 Tablespoons Unsalted Grass-fed Butter, Plus More For Greasing
• ¼ cups Unbleached All-purpose Flour
• 4 cups Low-fat Milk, Gently Warmed
• 2 Tablespoons Dijon Mustard
• ½ teaspoons Smoked Paprika
• 1 pinch Salt And Pepper, to taste
• 5 cups Shredded Cheese (about 20 Oz.), Divided
• 2 cloves Garlic, Minced
• 4 Tablespoons Olive Oil, Divided
• 16 ounces, weight Dried Pasta Shells (or Your Favorite Shape)
• ¼ cups Panko Breadcrumbs
• 6 cups Fresh Spinach Leaves
• 2 cups Cooked And Diced Ham
• 1 pinch Crushed Red Pepper Flakes, For Garnish (optional)