1 cups lime juice – freshly squeezed and strained
4 ounces white fish fillet – cut into chunks
0.5 cup red onion – thinly sliced
0.25 cup celery – chopped
0.25 cup cilantro stems – roughly chopped
1 pepper ajà limo chile – seeded and chopped
1 clove garlic – smashed
1 teaspoon ginger – grated
1.5 teaspoons salt
0.25 teaspoon white pepper – ground
1 cup ice cubes
Instructions
Ensure the lime juice is freshly squeezed and strained. Thinly slice the red onion; chop the celery; roughly chop the cilantro stems; seed and chop the ajĂ limo chile; smash the garlic; grate the ginger; and cut the white fish fillet into chunks.
In a blender, combine the white fish fillet, red onion, celery, cilantro stems, ajà limo chile, garlic, ginger, salt, white pepper, half of the lime juice (0.5 cup), and the ice cubes. Blend on high until the mixture turns milky and very cold, 10–15 seconds.
Add the remaining lime juice and blend briefly just to combine, about 5 seconds.
Strain the mixture through a fine-mesh sieve into a chilled bowl or measuring jug, pressing on the solids to extract as much liquid as possible. Discard the solids.
Taste and adjust salt if needed. Use immediately to marinate fish for ceviche, or pour into small glasses and serve very cold.