Mike Tyson is in talks with businessman Moshe Malamud to launch a high-end restaurant chain, a source said. The two talked shop at Malamud’s favorite kosher eatery, Solo, on Madison Avenue, where Tyson dined with his pregnant wife, Lakiha Spicer, on mushroom soup and mixed vegetables. Tyson, who announced his decision to follow a strict vegan diet last spring, is said to have interest in breaking into the kosher-food business. “They discussed the concept as well as the name, but nothing was finalized,” a rep for Solo said. Tyson’s rep had no comment.