1 tbsp (15 ml) unsalted butter 1 tbsp (15 ml) olive oil 1 medium fennel bulb, cored and thinly sliced (reserve fronds for garnish) 1 medium leek, white and light green parts only, thinly sliced and rinsed 1 small Yukon Gold potato, peeled and diced 1 small garlic clove, thinly sliced 4 cups (960 ml) low-sodium vegetable or light chicken stock 1 / 4 cup (60 ml) dry white wine (optional) 2 cups (300 g) fresh or frozen green peas 1 tsp finely grated lemon zest 1 tbsp (15 ml) fresh lemon juice, plus more to taste 2 tbsp (8 g) chopped fresh chives 2 tbsp (30 ml) extra-virgin olive oil (for chive oil) Kosher salt and white pepper, to taste Optional garnish: fennel fronds and a few toasted sliced almonds
Make the lemon-chive oil: In a small bowl or mini blender, blend the chives, extra-virgin olive oil, lemon zest, and a pinch of salt until vivid green; set aside. Sweat aromatics: In a medium pot over medium heat, warm the butter and olive oil. Add fennel and leek with a pinch of salt and cook, stirring, until soft but not browned, 6–8 minutes. Stir in garlic and potato; cook 1 minute until fragrant. Deglaze with white wine, if using, and simmer until nearly evaporated, about 1–2 minutes. Add stock; bring to a gentle simmer and cook until potato is tender, 12–15 minutes. Add peas and simmer until just tender and bright green, 3–4 minutes. Blend until silky using a blender; optionally pass through a fine sieve for extra smoothness. Return to the pot and adjust consistency with a splash of stock or hot water if needed. Season and brighten with lemon juice, salt, and white pepper to taste. Serve warm in bowls. Drizzle with the lemon-chive oil and garnish with fennel fronds and, if desired, a few toasted almond slivers to echo the trout’s crust.
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