Cook pasta according to package directions.

Meanwhile, in a large skillet over medium heat, melt 1 Tbsp butter. Add bread crumbs, Cook until browned. Remove from skillet, reserve.

In same skillet over medium heat, melt remaining butter. Stir in flour and cook, stirring, for 1 minute.

Add milk all at once. Cook and stir until mixture boils. Cook 2 minutes more.

Stir in 1 1/2 cups of cheese and ham.

Add hot pasta to skillet. Toss to coat.

Top with remaining cheese and buttered crumbs.