The owner of the iconic Park Slope events venue Grand Prospect Hall, Michael Halkias, died from COVID-19 on Wednesday. He was 82. Halkias’ death sent shockwaves throughout Brooklyn, where community leaders and friends remember him as a passionate, generous figure. “He was a Brooklyn character for sure in the best sort of way,” said Randy Peers, president and CEO of the Brooklyn Chamber of Commerce. “He was larger than life.” Halkias and his wife Alice bought Grand Prospect Hall in 1984 and turned the extravagant Prospect Avenue building into an opulent catering hall. The space became a New York icon because of its long-running, popular commercials, where Alice Halkias declares in a Greek accent, “We make your dreams come true!” …