Easy Slow Cooker A-1 Swiss Steak

This is an easy and very tasty meal.

2 lb. beef chuck, cut into 1 inch pieces
1/4 C A.1. original steak sauce
1 onion sliced
1 can [14-1/2 oz.] diced tomatoes
2 Tbsp flour
1/4 C water

Toss meat with steak sauce, place in slow cooker. Top with onions and tomatoes. Cover and cook on low 9 to 10 hours or high 4 to  5 hours.
Mix flour and water and stir into meat mixture, cook, covered 5 min. or until sauce thickens, stirring occasionally.
Serve over hot cooked noodles.

Can use A.1. bold and spicy steak sauce for more zing. I used Emeril's steak sauce.