Directions
<ol class="no-list-style"><li class="MethodStepper"><h4 class="step-title">Step 1</h4>Preheat your oven to 190°C (375°F) and lightly grease a 25cm (10-inch) casserole dish. Begin cooking your pasta in salted water until al dente, about 2 minutes less than package instructions. The pasta will continue cooking in the oven, so slightly undercooking it now prevents mushiness later.</li><li class="MethodStepper"><h4 class="step-title">Step 2</h4>While the pasta cooks, prepare your "tuna" by draining the hearts of palm and using a fork to gently flake them into shreds that resemble tuna texture. Don't over-shred – the varied texture is part of what makes this substitute convincing.</li><li class="MethodStepper"><h4 class="step-title">Step 3</h4>In a large saucepan, heat the olive oil over medium heat. Add the diced onion and cook for 5-6 minutes until translucent. Add the garlic and cook for another 30 seconds until fragrant. The slow cooking of the onions develops a sweet flavor base that enriches the final dish.</li><li class="MethodStepper"><h4 class="step-title">Step 4</h4>Make the cashew cream sauce by placing the drained soaked cashews, vegetable stock, nutritional yeast, lemon juice, dijon mustard, dried dill, dried thyme, and crumbled nori (if using) in a high-speed blender. Blend until completely smooth and creamy, about 2 minutes. This cashew base creates a rich, velvety sauce that rivals traditional dairy-based versions.</li><li class="MethodStepper"><h4 class="step-title">Step 5</h4>Pour the cashew cream mixture into the saucepan with the onions and garlic. Stir well and bring to a gentle simmer for 3-4 minutes until slightly thickened. The sauce should coat the back of a spoon but still remain pourable.</li><li class="MethodStepper"><h4 class="step-title">Step 6</h4>Drain the cooked pasta and add it to a large mixing bowl. Add the flaked hearts of palm, frozen peas (no need to thaw), capers, and the cashew cream sauce. Stir gently to combine, being careful not to break up the delicate "tuna" flakes too much. Season to taste with salt and black pepper – be generous with the seasoning as it really lifts the flavor profile.</li><li class="MethodStepper"><h4 class="step-title">Step 7</h4>Transfer the mixture to your prepared casserole dish, spreading it evenly. In a small bowl, combine the panko breadcrumbs with melted vegan butter and a pinch of salt, then sprinkle this mixture evenly over the top of the casserole. The breadcrumbs will create a deliciously crispy contrast to the creamy filling.</li><li class="MethodStepper"><h4 class="step-title">Step 8</h4>Bake in the preheated oven for 25-30 minutes, until the top is golden brown and the edges are bubbling. If the top browns too quickly, loosely cover with foil and continue baking. The casserole needs this time to allow the flavors to meld and develop that classic baked comfort food taste.</li><li class="MethodStepper"><h4 class="step-title">Step 9</h4>Remove from the oven and let stand for 5-10 minutes before serving. This resting period allows the casserole to set slightly, making it easier to serve while still maintaining its heat. Garnish with additional fresh herbs if desired and enjoy the nostalgic comfort of tuna casserole, made completely plant-based!</li></ol>