Boil a large pot of salted water, and cook the noodles. Meanwhile, prepare the cheese sauce.
8 ounces medium shell pasta
Melt the butter in a saucepan, then whisk in the flour, ground mustard, salt, and pepper. Cook for 2-3 minutes until smooth.
¼ cup unsalted butter, ¼ cup all-purpose flour, 1 teaspoon ground mustard, Salt and pepper
While whisking, slowly add the milk. Let it steep until steam rises from the pan, but don't boil!
3 cups whole milk
Add small amounts of cheese to the milk mixture and whisk to combine. Make sure the cheese melts completely before adding more. Keep adding and whisking until smooth.
16 ounces sharp cheddar cheese
Drain the noodles and return them to the pan. Add the cheese sauce, peas, and ham, then stir to combine. Serve warm!
1 ½ cups diced ham, 1 cup peas
Scroll up and see the post for tips, FAQs, and storage options.