Shellfish Prep Guide: Asari Clams and Hamaguri Clams

Want to cook clam dishes in HCMC but unsure about sand removal or how to check freshness? Asari (short-neck clams) and hamaguri (hard clams) taste dramatically better with proper preparation. This article covers the basics of shellfish prep, plus how to use Vietnamese ngheu and so as substitutes.

Why Shellfish Prep Matters

Clams often contain sand inside their shells. Cooking without sand removal results in an unpleasant gritty texture. Proper sand purging lets you enjoy the clams' natural sweetness to the fullest.

Clams are also highly perishable. HCMC's hot, humid climate demands extra caution. Knowing how to check freshness gives you confidence before cooking.

How to Prep Asari Clams

Sand Removal Steps

Make salt water at seawater concentration (2 tablespoons salt per 1 liter water, about 3%). Arrange clams in a single layer in a tray, add salt water until the clams are barely submerged. Cover with newspaper or a lid to darken, and leave at room temperature for 2 to 3 hours. In HCMC's heat, place in the refrigerator.

After soaking, rub the clams against each other under running water to remove surface dirt.

Checking Freshness

Fresh clams have tightly closed shells. Discard any that stay open when touched, have broken shells, or smell off. Clams that don't open during cooking may also be dead and should be removed.

How to Prep Hamaguri Clams

Hamaguri are larger than asari with an elegant, refined sweetness. The sand removal method is the same, but hamaguri typically contain less sand, so 1 to 2 hours of soaking is usually sufficient.

Hamaguri are especially popular in clear soup (osuimono) and celebratory dishes. Since each shell's pattern only matches its own pair, hamaguri symbolize good partnerships.

Vietnamese Alternatives: Ngheu and So

In HCMC, ngheu and so are available at supermarkets and markets. Vietnamese ngheu is a small bivalve similar to asari, with the same sand removal method. Vietnamese so is a large bivalve similar to hamaguri, also purged in salt water.

When substituting Vietnamese clams in Japanese recipes, keep these points in mind.

• Ngheu: substitute for asari. Great for miso soup, sake-steamed clams, and vongole pasta
• So: substitute for hamaguri. Works well in clear soup and grilled dishes
• Cooking time: Vietnamese clams may differ in size from Japanese ones, so remove from heat as soon as shells open

Japanese Recipes with Clams

Once prepped, clams work in a variety of Japanese dishes.

• Asari miso soup: place sand-purged clams in cold water and heat. When shells open, turn off the heat and dissolve miso in
• Sake-steamed clams: put clams, garlic, and sake in a pan, cover and steam until shells open. Top with green onion
• Hamaguri clear soup: add clams to kombu dashi, season with light soy sauce and salt when shells open. Garnish with mitsuba
• Vongole bianco: saute clams (or ngheu) with garlic and olive oil, steam with white wine, and toss with pasta
• Grilled hamaguri: grill clams (or so) on a rack, drizzle a few drops of soy sauce

Storing Clams in HCMC

In HCMC's temperatures, cook purchased clams as soon as possible. If you can't use them right away, store them as follows.

• Refrigerator: after sand removal, wrap in damp newspaper or paper towels and refrigerate. Use within 1 day
• Freezer: after sand removal, place shells and all in a zip-lock bag and freeze. Use within 1 month. Cook directly from frozen
• Note: thawing before cooking can make shells difficult to open. Add frozen clams directly to boiling water or a hot pan

Farmi's Quality Commitment

• Temperature-controlled delivery: from order to door, in as fast as 1 hour
• Japanese-quality ingredients: curated Japanese foods hard to find in HCMC
• Japanese language support: app and customer service available in Japanese
• HCMC-wide delivery: to your home or office

Download the Farmi app and order fresh clams and Japanese ingredients. Download Farmi

Frequently Asked Questions

Q1. How long does sand removal take? Soak in salt water (2 tablespoons salt per 1 liter water) at room temperature for 2 to 3 hours. In HCMC's heat, use the refrigerator. For a quick method, soak in 50°C warm water for about 15 minutes.

Q2. Are clams that don't open after cooking safe to eat? Clams that remain closed after cooking may have been dead beforehand. Do not force them open. Discard them to be safe.

Q3. Can Vietnamese ngheu replace Japanese asari? Ngheu is very similar to asari and works in miso soup, sake-steamed clams, and vongole pasta. Sand removal is the same. Adjust cooking time based on size, removing clams as they open.

Q4. What's the difference between hamaguri and Vietnamese so? Vietnamese so is a large bivalve similar to hamaguri. Flavor differs slightly but so substitutes well in clear soup and grilled dishes. Sand removal is the same.

Q5. Can I order shellfish through Farmi? Farmi delivers fresh, temperature-controlled ingredients in HCMC. Search for "clams," "shellfish," or "seafood" in the app. Delivery in as fast as 1 hour to your door.

Download the Farmi App

Looking for fresh clams and Japanese ingredients in HCMC? The Farmi app is your convenient choice. Order in Japanese, delivered in as fast as 1 hour.

Download the Farmi app and get clams delivered in as fast as 1 hour. Download Farmi

Note: this article and some images were created with the help of AI (artificial intelligence) and reviewed by our editorial team before publication.