* McDonald's plans 350 mln euro investment, new hires * Targets 3 pct Italy market share by 2015 from 2 pct now * Still faces cultural resistance in land of pizza and pasta By Francesca Landini MILAN, Jan 9 (Reuters) - U.S. fastfood giant McDonald's believes recession-hit Italy will be one of its higher-growth areas in the coming decade and is opening more than 100 new restaurants to convert pizza-lovers to its burgers.