Continue the final assembly only after the shrimp has marinated and is cooked.
If you marinated the shrimp in a bag, pour everything (including the juices) to a large bowl for the final assembly and serving.
Rinse and pat dry the remaining vegetables.
Remove peel and seed from the avocados and chop into 1/2 inch pieces. Add it to the shrimp bowl and toss gently to ensure the avocado pieces are coated in lemon and lime juices – they keep the avocado from turning brown.
Remove the stem and seeds from the red bell pepper, then chop into pieces about 1 inch x 1/2 inch or smaller and add it to the shrimp bowl.
Remove the cucumber peel, then chop into pieces about 1 inch or smaller and add it to the shrimp bowl.
Remove and discard the cilantro stems, then dice into small pieces and add it to the shrimp bowl.
Remove the stem and seeds from the jalapeno (rinse the inside to remove more of the spice), then dice into small pieces and add it to the shrimp bowl.
Slice the tomato into half, remove most of the juice and seeds with spoon or fork, then dice into 1/2 inch pieces and add it to the shrimp bowl.
Remove and discard root end of the green onion, then cut into 1/4 inch slices and add it to the shrimp bowl.
Using a large spoon, gently stir the shrimp bowl to thoroughly mix all of the ingredients and juices.
Add more salt, chili pepper, or black pepper to suit your taste.
Serve immediately or cover and refrigerate until ready to serve.
Shrimp Ceviche will keep in the fridge overnight with no issues, but I recommend eating it within 24 hours of making it.