Petrossian Paris Boutique and Cafe * 1/2 LOCATION 321 N. Robertson Blvd. (at Rosewood Avenue), West Hollywood; (310) 271-0576; www.petrossian.comAMBIENCE Casual cafe from Paris caviar purveyor Petrossian with a menu from former L'Atelier de Joël Robuchon sous chef Benjamin Bailly, just steps away from Robertson and Beverly boulevards' boutiques and design shops.SERVICE Earnest and charming.PRICE Dinner appetizers, $6 to $16; egg dishes, $16 ($26 with caviar); sandwiches, $12 to $18 ($23 with caviar); other dishes, $12 to $24; main courses, $15 to $28; dessert, $8. Sunday brunch, $35 per person, includes glass of Champagne.BEST DISHES Classic cold borscht, wild mushroom cappuccino, Petrossian salad, Napoleon tartare, croque madame sandwich, Tzar Cut Trio of smoked salmon, entrecote à l'échalote, short ribs, Sicilian pistachio crème brûlée.WINE LIST Limited, and not very interesting. Corkage fee, $25.BEST TABLE One of the corner back tables.DETAILS Open from 10 a.m. to 11 p.m. Mondays through Saturdays, 10 a.m. to 6 p.m. Sundays. Brunch is 10 a.m. to 4 p.m. Sundays and happy hour is 3 to 8 p.m. Mondays through Saturdays. Wine and beer. Street parking.Rating is based on food, service and ambience, with price taken into account in relation to quality. ****: Outstanding on every level. ***: Excellent. **: Very good. *: Good. No star: Poor to satisfactory.