Shell Casserole from Aunt Mable

From "Mable Hoffman's Crockery Cookery" book, here's one of our new family Sunday dinners.

1 lb lean ground beef
1 small onion chopped
1/2 tsp salt
1/4 tsp garlic powder
1 tsp Worcestershire sauce
1/4 cup flour
1 1/4 cups hot water
2 tsp beef bullion granules
2 Tablespoons red wine
6 oz large shell shaped pasta
1 two ounce can sliced mushrooms (i always leave out)
1 cup sour cream

In a skillet, cook ground beef and onion until red color dissapears. Drain beef; place in slow cooker. Stir in sald, garlic powder, worchestershire sauce and flour. Add water, bullion and wine, mix well. Cover and cook on LOW 2-3 hours. Meanwhile cook pasta according to package directions and drain. Add cooked pasta , mushrooms and sour cream to slow cooker, stir to mix ingredients. Turn to HIGH for 10-15 min. EAT!