Crockpot Creamy Beef & Mushrooms Over Noodles

Name: Crockpot Creamy Beef & Mushrooms Over Noodles
Cuisine: American
Ingredients: 2 and 1/4 pounds beef stew meat or sirloin tip steak cut into 1 inch cubes (beef chuck roast can also be used*); 1 packet (.87 ounces) brown gravy mix, (unprepared); 3 tablespoons dried minced onion; 1/4 teaspoon EACH onion powder, parsley flakes, paprika, pepper; 2 tablespoons beef boullion granules (NOT teaspoons!); 3 cups low sodium beef stock (or beef broth (stock is best!), separated); 1/2 tablespoon minced garlic; 1 package (8 ounces) cremini mushrooms (sliced); 3 tablespoons unsalted butter; 3 tablespoons white flour; 1/2 cup half and half (or sub whole milk); Serve over: Cooked egg noodles, such as Reames Egg Noodles; Optional: fresh parsley, sour cream, additional salt/pepper