Kicking off Horizon’s New American Dreams Series is a powerful comedy-drama following a hopeful group of immigrants as they form an unlikely family, working to master the ups and downs of language, love, and staying afloat in their city. Citizens Market makes its Southeastern premiere at Horizon Theatre Company with an all-star cast and creative team, with performances beginning May 18. A good small supermarket has everything its neighborhood needs, including a charming cast of characters behind the counter. Citizens Market follows a hopeful group of immigrants as they form an unlikely family, working to master the ups and downs of language, love, and staying afloat in their new world. The Pittsburgh…