Quick Answer

This product is actually pig sea cucumber, a type of sea cucumber; market data often refers to pig sea cucumber as sea mouse or grey sea cucumber, with the common scientific name Stichopus horrens. Since the photo only confirms the product is frozen pig sea cucumber, it cannot be assumed to be pre-cooked; please follow the thawing and heating instructions on the packaging first. If the packaging does not provide clear instructions, it is recommended to treat it as fresh sea cucumber: thaw in the refrigerator, wash clean, add to water and bring to a boil over medium heat, then reduce to low heat and maintain a gentle simmer for approximately 30 to 45 minutes, until the sea cucumber shrinks, becomes elastic, and the centre is fully heated through; then slice it, mix with Mexican lime, tomato, red onion, coriander, and a small amount of green chilli, and finally serve on corn tostadas.

Ingredients

• Frozen pig sea cucumber 350g
• Corn tostadas 6 to 8 pieces
• Limes 3, juice approx. 60ml
• Ripe tomato 1, deseeded and finely diced
• Red onion 60g, finely diced
• Fresh coriander 15g, chopped
• Green chilli 1, deseeded and finely diced
• White vinegar 1 teaspoon
• Olive oil 1 tablespoon
• Dried oregano 1/4 teaspoon
• Avocado 1/2, sliced
• Sea salt approx. 1/3 teaspoon, adjust to taste
• Black pepper a pinch
• Water as needed

Method

1. Safe Thawing of Pig Sea Cucumber

   First check the packaging; if a specific thawing method is specified or the product is pre-cooked, you must follow the packaging instructions. If there are no special instructions, place the frozen pig sea cucumber in the refrigerator to thaw slowly; if in a hurry, it can be submerged in cold water in a sealed bag, changing the water every 30 minutes. Do not thaw on a room-temperature countertop.

2. Washing and Inspection

   After thawing, wash the surface under running cold water to remove frost and impurities. If the abdominal cavity still contains intestines, sand grains, or obvious residue, carefully open along the belly and thoroughly remove them, then rinse clean. If the packaging indicates the product has been cleaned and pre-processed, there is no need to open it again.

3. Simmering Until Elastic

   Add sufficient water to a pot, bring to a boil over medium-high heat, then add the pig sea cucumber; immediately reduce to low heat once boiling resumes, maintaining a gentle simmer for approximately 30 to 45 minutes. The sea cucumber will shrink noticeably, and the outer layer will change from soft to elastic; the thickest part should be fully heated through. If using a food thermometer, the centre should reach at least 63°C.

4. Slicing and Cooling

   Remove the pig sea cucumber and drain, allowing it to cool for about 10 minutes until no longer hot to the touch, then slice into thin pieces approx. 0.5cm thick. Do not slice too thinly; retaining thickness allows the crisp elasticity of the sea cucumber to be felt without being completely overwhelmed by the lime and vegetables.

5. Preparing the Mexican Sour Aromatics

   Mix lime juice, white vinegar, olive oil, sea salt, black pepper, and dried oregano, then add tomato, red onion, coriander, and deseeded green chilli. Lime is the star, with vinegar only providing a slight sour lift; if Hong Kong households prefer less spice, use only half a green chilli.

6. Mixing with Sea Cucumber

   Add the cooked sea cucumber slices to the sour vegetable mixture, stir gently, and refrigerate for about 10 minutes to allow the sea cucumber to absorb the lime and tomato flavours. This step is for flavouring only, not for using lime as a substitute for heating; the sea cucumber must be safely heated first.

7. Serving on Corn Tostadas

   Only before serving, distribute the sea cucumber sour mixture onto the corn tostadas to prevent the tostadas from absorbing juice too early and becoming soggy. Finally, top with avocado slices and a small amount of coriander, and eat while crisp. The finished dish should have crisp corn tostadas, elastic and smooth sea cucumber, clear lime acidity, juicy tomato, and a mild spiciness that emerges only at the end.

Frequently Asked Questions

Can pig sea cucumber be cooked directly from frozen?

First check the packaging instructions. If the product is clearly labelled as ready to cook, follow the packaging time and heat settings; if not specified, it is safer to thaw in the refrigerator first, then wash and cook. Do not assume frozen sea cucumber is pre-cooked.

Can lime juice replace cooking pig sea cucumber?

Not recommended. Mexican ceviche does use citrus acid to denature some seafood proteins, but lime is not equivalent to reliable thermal sterilisation. Since this uses frozen pig sea cucumber, it should be heated first, then lime used for sour aromatic seasoning.

How long should pig sea cucumber be cooked so it is not hard?

If it is unprocessed fresh sea cucumber, it can be simmered gently for about 30 to 45 minutes; the texture will change from soft to dense and elastic. There are significant differences depending on variety, size, and processing method, so packaging instructions should take priority. If a softer texture is desired, it can be slow-cooked at low temperature after being safely cooked, rather than boiled vigorously in water for a long time.

Will the Mexican sea cucumber tostadas be very spicy?

Traditional Mexican coastal seafood dishes often use chillies, but this version uses only one deseeded green chilli, primarily highlighting the flavours of lime, tomato, and the sea cucumber itself. If you prefer less spice, reduce to half a chilli or omit it entirely.

Can prepared sea cucumber ceviche be kept until the next day?

The best way to eat it is as soon as possible after the sea cucumber is seasoned, especially the corn tostadas which should be eaten immediately. If storage is necessary, keep the sea cucumber mixture and tostadas separate, seal and refrigerate immediately, and handle according to the shelf life of the ingredients and packaging; do not consume seafood that has an off smell or has been left at room temperature for a long time.