This paper demonstrates an innovative role for experts in supporting participatory policy processes wth an application to landslide risk management in the Italian town of Nocera Inferiore. Experts co-produce risk mitigation options based on their specilized knowledge taking account of local  knowledge and values by directly coupling stakeholder discourses with option design. Drawing on the theory of plural rationality and based on a  literature review, interviews and a public questionnaire, stakeholder discourses are elicited on the landslide risk problem and its solution. Armed with the  discourses and in close interaction with stakeholders, experts provide a range of technical mitigation options, each within a given budget constraint. These options are subsequently deliberated in the participatory process with the intent of reaching compromise recommendations for landslide risk  mitigation. As we show in an accompanying paper, "Compromise not consensus. Designing a participatory process for landslide risk mitigation",  the provision of multiple co-produced policy options enhances stakeholder deliberation by respecting legitimate differences in values and worldviews.