Cut the beef and vegetables into bite-sized pieces.
Melt butter in a pan and sauté the beef.
Add onions, carrots, and other vegetables and stir-fry together.
Add flour and mix evenly.
Pour in tomato sauce and broth.
Season with bay leaf, herbs, salt, and pepper.
Simmer over medium-low heat for 30 minutes.
Transfer the finished sauce to a plate.