Park Slope's up-and-coming third main drag continues its ascent with Olivier, an authentically executed French bistro on 4th Avenue. Head chef Guillaume Thivet has crafted a menu verité with a soup de poisson, escargots de Bourgogne, a Provençal carpaccio, and entrees like duck legs, mussels a la rouille, a hanger steak frites, and a 24oz. cote de boeuf for two, with fingerling potatoes. The breakfast menu is just as appealing, with egg sandwiches on ciabatta bread, French toast with chantilly and maple syrup, gauffres with bananas and Nutella, the traditional baguette beurre and confiture, and, on a more lunch tip, a croque monsier!