Step 1

1 Toss the onion slices in a small bowl with 1 tsp salt and the lime juice.

Step 2

2 In a different bowl, place the fish, garlic, jalapeño, tomatoes, cucumber, cilantro, and olive oil. Chill for 50 minuts.

Step 3

3 Add the avocado, fix the seasonings and serve. If using the sauce, blend all ingredients in the blender, adding more oil and water if needed.