Coconut Milk Ceviche w Ahi Tuna

1 pound Ahi Tuna
boned (if needed) and cut into small squares
1/3 cup fresh lime juice
1/2 teaspoon minced jalapeño
Salt
1 and a half cups coconut milk
1 tablespoon minced red onion
1 tablespoon fresh cilantro leaves,
rinsed and chopped, plus
more to garnish
Freshly ground black pepper
1/2 avocado, pitted, skinned and
sliced 1/8" thin.

In a stainless steel bowl, toss tuna with limejuice, jalapeño and a pinch of salt. Cover bowl and let macerate in the refrigerator for 45 minutes.
Add coconut milk, red onion and cilantro, and season with salt and a bit of fresh pepper. Taste and adjust seasoning, adding more limejuice, coconut milk or salt if needed. Serving: divide an avocado among six bowls, and season with a pinch of salt. Spoon in the ceviche, drizzling it with the sauce. Garnish with *cilantro leaves.
*Cilantro can be substituted with mint or parsley.