Equipment
Ingredients
Aromatics and Base
- 1200 ml vegetable broth, divided use
- ⅛ g saffron threads
- 30 ml olive oil, extra virgin
- 150 g leek, cleaned and sliced, white and light green parts only
- 150 g fennel bulb, diced
- 15 g garlic, minced
Hearty Vegetables and Legumes
- 300 g yukon gold potatoes, peeled and diced into 1.5cm cubes
- 250 g cannellini beans, cooked and rinsed
- 5 g sea salt
- 2 g black pepper, freshly cracked
Finishing Ingredients
- 100 g baby spinach, washed
- 4 large eggs, room temperature
Nutrition (per serving)
Nutrition is estimated per serving. Nutrients without complete source data are omitted.
Full nutrition
- Calories
- 544 kcal
- Protein
- 19 g
- Carbohydrates
- 88 g
- Fat
- 13 g
- Fiber
- 13 g
- Sugar
- 8 g
- Sodium
- 1554 mg
- Saturated Fat
- 3 g
- Trans Fat
- 0 g
- Monounsaturated Fat
- 7 g
- Polyunsaturated Fat
- 2 g
- Cholesterol
- 186 mg
- Potassium
- 1707 mg
- Calcium
- 189 mg
- Iron
- 5.6 mg
- Magnesium
- 96 mg
- Phosphorus
- 285 mg
- Zinc
- 1.4 mg
- Vitamin A
- 289 mcg
- Vitamin C
- 21 mg
- Vitamin D
- 1.0 mcg
- Vitamin E
- 2.9 mg
- Vitamin K
- 167 mcg
- Vitamin B6
- 0.9 mg
- Vitamin B12
- 0.5 mcg
- Thiamin
- 0.31 mg
- Riboflavin
- 0.38 mg
- Niacin
- 3.6 mg
- Folate
- 125 mcg
- Water
- 427 g
Sources: Aggregated Public Data, USDA FoodData Central
Method
Gently warm 60ml of the vegetable broth in a small cup. Add the saffron threads and stir gently. Set aside for 15 minutes to allow the vibrant color and floral flavor to bloom.
Heat the olive oil in a Dutch oven over medium heat. Add the sliced leeks and diced fennel, cooking slowly until softened and translucent, which takes about 8 minutes. Add the minced garlic and cook for 1 additional minute until highly fragrant.
Pour the remaining vegetable broth and the bloomed saffron liquid into the pot. Add the diced potatoes, cannellini beans, sea salt, and black pepper. Bring the liquid to a gentle boil, then reduce the heat to maintain a steady simmer at 95 degrees Celsius or 203 degrees Fahrenheit. Cook for 15 minutes.
Stir the baby spinach into the simmering soup and cook for 1 to 2 minutes until just wilted. Taste the broth and adjust the seasoning with additional salt or pepper if desired.
Using a ladle, create a shallow well in the vegetables and carefully crack an egg directly into the simmering broth. Repeat with the remaining eggs, spacing them evenly. Cover the pot and cook for 3 to 4 minutes at 90 degrees Celsius or 194 degrees Fahrenheit until the egg whites are set but the yolks remain fluid. The internal temperature of the eggs should reach 74 degrees Celsius or 165 degrees Fahrenheit for food safety.
Carefully ladle the soup into wide, shallow bowls, taking extreme care to ensure each portion receives one intact poached egg. Serve immediately.
Chef's Notes
- Blooming saffron in warm liquid before adding it to the main pot ensures the maximum release of its complex floral notes and vibrant golden color.
- Leeks retain a significant amount of sand and dirt between their layers. Always slice them first, then wash thoroughly in a large bowl of cold water, lifting the leeks out so the grit stays securely at the bottom.
- For the best poached eggs in soup, freshness is paramount. Fresh eggs contain tighter, more viscous egg whites that naturally hold their shape and embrace the yolk when dropped into hot liquid.
- To prepare this dish ahead of time for guests, construct the soup completely up to the point of adding the spinach and eggs. Reheat the broth to a simmer, stir in the greens, and poach the eggs at the very last moment before serving.
Storage
Refrigerator: 3 days — Store soup without the poached eggs. Poach fresh eggs when reheating.
Freezer: 3 months — Freeze without spinach and eggs. Add fresh spinach and poach eggs upon reheating.
Reheating: Warm gently on the stovetop until simmering, then add fresh spinach and poach new eggs.
Troubleshooting
Egg whites break apart and turn the soup broth cloudy
Cause: The soup was boiling too vigorously when the eggs were added, or the eggs were not fresh
Fix: Cannot be fixed, but the soup will still taste excellent as an egg-drop style broth.
Prevention: Ensure the soup is at a very gentle simmer before adding eggs. Use the freshest eggs possible as they have tighter whites.
Broth lacks a distinct saffron flavor and color
Cause: Saffron was added directly to the large volume of liquid without blooming first
Fix: Allowing the soup to rest for an hour off the heat may deepen the flavor as the saffron slowly hydrates.
Prevention: Always steep saffron threads in a small amount of warm liquid before incorporating them into a dish.
Cultural Context
This dish draws heavy inspiration from the traditional peasant soups of Provence, specifically taking cues from Aigo Boulido, a simple garlic and herb broth historically poured over rustic bread, and the saffron-rich broths of Mediterranean coastal towns. Saffron, originally introduced to southern France by Moorish traders, elevates humble root vegetables and legumes into a dish of profound depth and elegance. The addition of a poached egg transforms a light vegetable soup into a robust, sustaining one-pot meal historically enjoyed by farmers returning from the fields.
