Gonna cook Peruvian dish. Needs suggestions!

I'll be cooking a Peruvian dish for my grandparents this weekend and I need suggestions. This will be my first time cooking a Peruvian cuisine and I badly need your help on what to cook. My grandma loves a foreign dish, so I'm thinking a Peruvian dish is a breath of fresh air. What should I make them that they will surely drool over?

I like Peruvian cuisine too!