Creamed Turkey on Mashed Potatoes

Creamed Turkey on Mashed Potatoes
1/2 cup chopped onion
2 tablespoons butter
2 tablespoons all-purpose flour
1/4 teaspoon salt
1/8 teaspoon white pepper (I just used regular pepper)
2 cups milk
2 cups cubed cooked turkey breast (I used chicken)
1 cup forzen mixed veggies
2 cups hot mashed potatoes

In a large saucepan, saute the onion in butter until tender.  Sprinkle with flour, salt, and pepper.  Stir in the milk until blended.  Bring to a boil; cook and stir for 2 minutes or until thickened and bubbly.  Add the turkey (chicken) and veggies; cover and simmer until heated through.  Serve over mashed potatoes.

I don't know if it was my alternatives that I used or just the recipe itself, but it wasn't the best.  I'll probably keep it and make it again in the future because it was incredibly easy and quick to make and it was OK, but definitely not one of my favorites.