Slow Cooker Swiss Steak

I love my slow cooker and I love Swiss steak..what could be a better mix!
This is actually a Paula Deen recipe..and I love it.

NEED:
1 1/2 pounds round steak, cut into 1-inch pieces
1 (8-ounce) package sliced fresh mushrooms ( optional )
1 cup sliced onion
1 cup sliced celery
1 tablespoon minced garlic
1 (14.5-ounce) can fire-roasted diced tomatoes ( can use regular diced tomatoes )
1 (8-ounce) can tomato sauce
1/2 cup water
1 (0.87-ounce) package brown gravy mix
1/2 teaspoon salt
1/2 teaspoon ground black pepper


Instructions:
1.In a 4- to 6-quart slow cooker, combine steak, mushrooms, onion, celery, and garlic.
2.In a medium bowl, combine tomatoes, tomato sauce, 1/2 cup water, gravy mix, salt, and pepper. Pour over steak mixture. Cover and cook on low for 8 to 10 hour.

ENJOY!