Step 1

Preheat oven to 350F/180C.

Step 2

Bring a pot of salted water to a boil and add the elbow pasta to it. Cook the pasta for half the time of package directions. Drain the pasta and set it aside.

Step 3

Into a large bowl, grate the cheddar cheese, reserving 1 cup for topping. Add the pasta and the diced ham to it.

Step 4

Separately, in a medium bowl, mix flour, onion powder, mustard powder, and salt. Whisk in the eggs, sour cream, and milk until you obtain a smooth mixture.

Step 5

Place the pasta in a baking dish and pour over the mixture of milk, sour cream, and eggs. Stir to combine. Top with reserved grated cheese.

Step 6

Bake for 30 minutes until bubbly, and a crust is formed. Let stand for 10 minutes before serving.