Preheat the oven to 350 degrees F. Place the tomato sauce in a 9 by 13-inch baking dish
and place in the oven to heat.
In a the bowl of a food processor
mix the croutons, cheese
and garlic until it forms a paste.
Brush the pounded flank steak with the olive oil and season generously with the salt and pepper. Spread the filling evenly over the meat. Roll tightly and tie with butcher's twine.
In a large saute pan heat 1 to 2 tablespoons of vegetable oil and sear
all sides of the rolled meat. Remove from the pan.
Add to the hot tomato sauce
, cover with a tin foil tent so that the foil is not touching the meat. Braise
for 35 minutes or, up to 3 hours.