DUAL CELEBRATION: Merkato 55, now called Le 55, reopened on Thursday featuring a menu designed by chef Philip Guardione, former head chef of the Four Seasons in Milan. Fernanda Motta, the brunch hot spot’s co-owner and host of “Brazil’s Next Top Model” was on hand in Manhattan’s Meatpacking District to fete the restaurant and her birthday. “What can I say? We wanted a fresh start,” she said of the restaurant’s brief closing and name change. “I am a Gemini after all.” Hosting Motta’s celebration — a relatively intimate dinner for 50 — was close friend and Victoria’s Secret “angel” Alessandra Ambrosia. After a leisurely Latin meal (the last course wasn’t served until midnight), the women led the crew downstairs to Bijoux for cocktails.