Preheat oven to 370 Degrees
Arrange foil using 2 sheets and folding them together to create 1 bigger sheet.
Butter or oil the foil
Cut the veggies to size
Season the steak with salt and pepper, trim off the fat and cut into serving sizes.
Arrange vegetable and steak on foil and sprinkle onion soup mix over the top
Add ½ to ¾ whole tomatoes and reserve the juice for the next step.
In a separate bowl add A1 sauce, tomato juice, cornstarch. Whisk together until smooth and pour mixture over meat and veggies.
Fold foil edges to create a pouch and seal tightly.
Bake for 2 hours.