Creamy Spinach Spaghetti with Herb Chicken

I wasn't crazy about this dish I made up toinight but maybe someone else will like it :)

3 chicken breast
Fresh sprigs of lemon thyme, curly leaf parsley, oregano
Few slices of onion
1 box spaghetti
1.5 tbsp butter
1 tbsp flour
1 cup warm milk
1/2 box frozen spinach thawed and drained
Salt
Black Pepper
White Pepper
Nutmeg

Chicken:
Clean chicken and put in a sprayed baking dish. Sprinkle salt and black pepper and fresh herbs on top of chicken, top with onion. Cover with foil and bake at 375 for about an hour.

Bring pot of salted water to boil for spaghetti. Cook until tender.

Sauce:
Melt butter in saucepan. Add flour and whisk until smooth. Slowly add warm milk mixing the whole time until sauce is thick, creamy, and lump free. Add a dash of salt, white pepper, and nutmeg (very little nutmeg) and stir.

Drain spaghetti and put back into pot. Add spinach and sauce, mix well.