I got the idea for aguachile using other seafod from the aguachile I ate in Mexico. No serrano chillies but I had lots of yellow (long) peppers so I used those. Cucumber is traditional but I think some other crunchy and refreshing vegs are fine. I would use radishes.
Some aguachile in Mexico
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Another yellowtail aguachile
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Re travel, too much of a hassel in the first phases of measures being lifted. There will be long queues everywhere and we are still not sure yet how safe it will be in autumn or even winter. I’m respiratory sensitive and that places me in the high-risk catergory. The thought of being stuck at home at christmas depresses me (I don’t do christmas).