Cut the chuck flap steak and vegetables into bite-sized pieces.
Season the steak with salt and pepper.
Heat oil in a pan and sear the steak until the surface is cooked.
Place the steak, prepared vegetables, tomato sauce, and broth in a pot.
Bring to a boil over medium heat, then reduce to low and simmer for 30 minutes to 1 hour.
Taste and adjust seasoning with salt if needed.