It looks like Tara Thai will open around Christmas at Westfield Montgomery Mall, where the company has finalized plans to take over a portion of the long-empty Legal Sea Foods space. Rich Amsellem of Streetsense, who brokered the deal for Tara Thai, says the atmosphere will be a little more relaxed than the chain’s other locations, with “Thailand beach resort” decor and indoor/outdoor seating for 85 people. The mall is negotiating with another tenant to take the other half of the Legal space.