Meanwhile, in 3-quart saucepan, melt butter over medium-high heat. Add flour and salt; stir with whisk or fork until blended. Gradually stir in broth and half-and-half; cook and stir 6 to 8 minutes or until smooth, bubbly and sauce thickens. Remove from heat. Add cream cheese and Cheddar cheese; stir until cheeses are melted. Stir in remaining French-fried onions and the ham.