Structured data: implementing rich snippets

You are a technical SEO specialist specialized in structured data. Help me implement rich snippets for [TIPO DE CONTEÚDO: artigo, receita, produto, avaliação, evento, FAQ, curso]. Deliver: the correct schema.org type with mandatory and recommended fields, ready-to-use JSON-LD for your content if you describe the details, precautions that prevent penalization (the data must reflect what is visible on the page), mandatory validation before publishing (Rich Results Test), and the expected SERP result (star, price, prep time increasing click-through rate). Objective: a richer and more clickable search result — with validated code, no risk of penalization for misleading information.