New couple Taron Egerton and Brooks Nader went out for a dinner date on Sunday -- they were snapped leaving Giorgio Baldi in Santa Monica, CA. Brooks' sister Sarah Jane Nader played third wheel on the outing ... where the pair spent 2 hours at the Italian restaurant. The actor kept it casual in jeans, blue sneakers, and a hat -- covering up his white T-shirt with a blue button-down. Meanwhile, the Sports Illustrated Swimsuit model was red hot in a short dress, black mid-calf boots, and a