1Marinate the fish
In a large bowl, combine the lime juice, fish sauce, red chili, garlic, red onion, cilantro, and cucumbers. Season with salt and mix well. Add the mahi-mahi and gently toss to combine. Cover and refrigerate for 30 to 60 minutes, or until the fish has turned opaque.
2Make the chili crisp
To make the grapefruit chili crisp, in a small bowl, combine the chili crisp and honey and mix well. Add the grapefruit segments to the same bowl, then squeeze any juice from the remaining grapefruit core over the bowl.
3Assemble
Gently mix, breaking up the grapefruit into smaller pieces.
To serve, drain the liquid and transfer everything to a serving bowl, then gently fold in the avocado. Place the bowl of grapefruit chili crisp next to it, with the romaine leaves and mint alongside. To eat, add a spoonful of ceviche to a lettuce leaf and top with grapefruit chili crisp and mint leaves.
Serve with a chilled glass of Sauvignon Blanc and enjoy!