Beef Stew without florets mushroom

1 teaspoon olive oil 2 cups white pearl onions 2 cups baby carrots 2 medium leeks , well-washed and thinly sliced 15 ounces boneless beef loin, cut into[...]

1 1/2 lbs beef tenderloin 2 cups onions 2 cups carrots 1 (10 ounce) can whole tomatoes 1 (10 ounce) can small whole potatoes 5 garlic cloves 4 tablespoons[...]