Beef with vinegar

2 tablespoons olive oil 1 1/2 pounds stewing beef cut into 1 inch pieces 16 ounces mushrooms halved 3 cups carrot diagonally cut 1 cups onion coarsely chopped[...]

4 cups salad greens (lettuce, chinese cabbage, spinach) * 3 cups beef roast rare, cut in strips * 2 each tomatoes cut in wedges 1 each green bell pepper cut[...]

4 x Fillets steak, each weighting about 140g     Salt and freshly grnd black pepper 3 Tbsp. Vegetable oil 4 lrg Flat mushrooms 20 gm Unsalted butter 4 Tbsp.[...]