In a medium saucepan on medium heat, melt butter, when hot, whisk in flour, whisk until smooth.
Slowly whisk in milk, broth, and water. Whisk constantly until thickened. Stir in salt.
Stir in chicken, rice, mushrooms, pimento, and bell pepper.
Preheat your oven to 180° C (350° F), get out and grease a 7x11 baking dish with butter.
Pour chicken mixture into the prepared pan, spread out evenly.
Bake for 30 minutes or until hot.
Sprinkle with toasted almonds, serve with sides of your choice, enjoy.