White Cheddar Chicken Pasta

For the chicken:
1 pound boneless, skinless chicken breasts, trimmed and cut into 1 inch pieces
1 tsp dry mustard
1 T fresh thyme
1/2 tsp salt
1/2 tsp pepper
1 T olive oil

For the pasta:
1 pound rotini or other short cut pasta
2 T butter
2 T flour
2 cloves garlic, minced
1 small onion, finely diced
1/4 cup dry white wine
1 T Dijon mustard
8 oz sharp white cheddar cheese, grated
2 cups milk (I used skim milk but mixed in about 2 T heavy cream)
1 T fresh thyme
1 T fresh oregano
Crushed red pepper flakes to taste
Parmesan cheese to taste

Source: homeiswheretheholmansare