slices of light white bread, made into coarse crumbs ( 1 cub) • grated parmesan cheese • lightly packed thinly sliced fresh basil • garlic cloves, minced • thin slices of lean beef top round ( about one pound), trimmed • salt • black pepper • olive oil • white mushrooms, sliced • zucchini, halved lengthwise and then sliced • (14 1/2- ounce) can Italian plum tomatoes, tomatoes broken up and juice reserved • chopped fresh flat-leaf parsley