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Level 3 Moderately Thick
Prep: 20 min Difficulty: Easy Main ingredient: tomato
#level-3#level-2#tomato#egg#soup#cantonese#hong-kong#liquidised#quick#high-protein#everyday

Tomato Egg Drop Soup (Strained) | IDDSI Level 2–3 Recipe

IDDSI Level 2–3 (Mildly Thick to Liquidised) | 20 minutes | Easy

Tomato egg drop soup (番茄蛋花湯, faan ke daan fa tong) is one of Hong Kong’s most beloved quick soups — a weeknight staple found in family kitchens, cha chaan tengs, and school canteens alike. The combination is simple: ripe tomatoes simmered in a light stock, with eggs drizzled in thin streams to form delicate, silky “flower” ribbons (蛋花). The result is a brightly coloured, tangy-sweet, protein-enriched broth that is as comforting as it is nutritious. Unlike the multi-hour 老火湯 tradition, 番茄蛋花湯 is typically ready in under 20 minutes — making it practical for daily preparation in home or care settings. For individuals on IDDSI Level 2–3 diets, tomato skin, seeds, and any undissolved egg ribbons present hazards. This recipe strains the soup to remove all tomato solids and seeds, while dissolving the egg thoroughly through stirring, producing a smooth, naturally thickened liquid that can meet Level 2 (Mildly Thick) or Level 3 (Liquidised) depending on the egg ratio and straining method used.

Ingredients (2–3 servings)

Method

  1. Quarter tomatoes and place in a saucepan with stock or water. Bring to the boil over medium-high heat.
  2. Add ginger slices if using. Reduce to a simmer and cook for 10 minutes until tomatoes are very soft and beginning to break apart. The broth will become a deep tomato-red.
  3. Remove ginger slices. Pour soup through a fine-mesh sieve into a clean saucepan, pressing tomato pulp through the mesh to maximise liquid extraction. Discard tomato skins and seeds — these are the primary hazard. Push pulp actively through the sieve using the back of a spoon.
  4. Return the strained tomato liquid to the saucepan over medium heat. Season with salt and sugar if needed. Bring back to a gentle simmer.
  5. If targeting Level 2 (Mildly Thick): stir the cornstarch solution into the simmering liquid and stir continuously for 1–2 minutes until slightly thickened.
  6. Beat eggs thoroughly. With the soup at a gentle simmer (not rolling boil), pour the beaten egg in a very thin, steady stream while stirring the soup continuously in one direction with a fork. This creates fine, smooth egg threads rather than large curds.
  7. Remove from heat immediately after egg is incorporated. Continue stirring for 30 seconds.
  8. Pour through the fine-mesh sieve one more time to remove any large egg thread fragments. The final liquid should be smooth, uniformly coloured, and particle-free.
  9. Add sesame oil if using. Serve immediately at 55–60°C.

Texture Test

IDDSI Level 3 (Liquidised) confirmation: Tilt a loaded spoon — the strained tomato-egg soup should flow slowly and continuously. Without cornstarch: confirm the syringe test at 1–10ml in 10 seconds. With cornstarch thickening: if viscosity is higher, it may qualify as Level 2 (Mildly Thick) — 4–8ml in 10 seconds. Select the target level based on the individual’s dysphagia assessment.

Egg incorporation check: The final strained liquid should appear as a uniformly tinted (orange-gold) smooth liquid with no visible egg threads or tomato seed fragments.

Safety Notes

⚠️ Tomato skins are a critical hazard — tomato skin does not break down with cooking and is a slippery, thin film that is among the most commonly aspirated food items. Every tomato skin fragment must be excluded.

⚠️ Egg curd chunks — if the egg is poured into a rolling boil, it forms large curds rather than fine threads. Use a gentle simmer and continuous stirring to keep egg particles fine; then strain to ensure complete removal of any larger fragments.

⚠️ Serving temperature — this soup should be served promptly; it loses quality on reheating as the egg can become rubbery.

⚠️ Egg allergy — confirm there are no egg allergies before serving.

Sourcing Outside Hong Kong

For international care kitchens and home cooks outside Hong Kong, Cantonese ingredients are widely available at East and Southeast Asian grocery stores:

Fresh tomatoes: universally available at any supermarket.

If a specific ingredient is unavailable in your region, the recipe notes alternative substitutions in the Ingredients section. For dishes requiring fresh Cantonese-specific ingredients (e.g. preserved century egg, fresh rice noodle rolls), check with your local East Asian grocer before substituting — texture compliance for IDDSI levels may require specific products.

Nutrition

Approximately 80–100 kcal per 200ml serving (with eggs). The strained soup provides lycopene (from tomatoes — significantly more bioavailable from cooked tomatoes than raw), complete protein from eggs (approximately 3–4g per serving), vitamin C, potassium, and folate. For elderly individuals, the bright red-orange colour and tangy flavour profile make this one of the more appetite-stimulating IDDSI-compliant liquids available. High daily lycopene intake from tomatoes has been associated with cardiovascular benefit in epidemiological studies — a relevant consideration for elderly populations.

Cultural Note

番茄蛋花湯 is the quintessential quick, kind soup — made in the time it takes to prepare a bowl of rice, ladled out to a sick child, a working husband, an elderly parent who hasn’t eaten enough. Its accessibility is its virtue: no special ingredients, no long waiting, just ripe tomatoes and eggs. In Hong Kong households this soup bridges generations effortlessly. For a care facility, 番茄蛋花湯 represents a recipe where the Level 3-adapted version requires minimal modification — the flavour, colour, and emotional resonance are almost fully preserved through straining.

Storage and Reheating

⚠️ This recipe is for reference only. Texture varies by technique and ingredients. A speech therapist should confirm the appropriate IDDSI level.
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