In a large skillet, heat olive oil over medium heat. Add garlic and mushrooms and cook 5 minutes, stirring occasionally. Add prosciutto and cook 5 minutes stirring occasionally until crispy. Stir in cream and reduce the heat and simmer 12 minutes or until thickened. Stir in chicken, cheese, salt, rosemary, oregano and thyme and cook 5 to 10 minutes or until thoroughly heated. Serve over cooked pasta. Garnish with chopped tomato and Romano cheese if desired.