Sprinkle flour over beef mixture and cook for 1-2 minutes, stirring often.
1/4 cup flour
Pour in beef broth and add uncooked egg noodles. Simmer for 20 minutes, stirring occasionally until noodles are cooked and sauce thickens. If it's too thick, add remaining beef broth to thin it out.
3 1/2 cups beef broth, 3 cups egg noodles
Beef and noodles will keep in an airtight container for 3-5 days in the fridge.
Notes
Don't over cook the egg noodles. They'll continue to soften when removed from heat.
Add veggies. During the last 5 minutes of simmering, stir in frozen peas or chopped mushrooms if desired.
Leftovers: This meal will thickens as it sits. To reheat, warm on the stove or in the microwave with a splash of broth or water to loosen.