Stirring tender roasted pumpkin into a rich red lentil curry, this is a hearty plant-based meal that's perfect served alongside some basmati rice or a warm roti.
Preheat oven to 220°C/425°F. Add the pumpkin to a parchment-lined baking tray. Drizzle with 1 tbsp of olive oil and season generously with salt and pepper. Toss to combine. Move to the oven and roast until fork tender and browned in places - about 20 minutes.
Meanwhile, add the cumin seeds, black mustard seeds and fennel seeds to a medium saucepan. Set over medium heat and gently toast the seeds. Once they are dancing slightly across the pan, add 2 tbsp of neutral oil. Add the onion along with a generous pinch of salt. Cook, stirring occasionally, until they're softened and beginning to brown around the edges - about 7-10 minutes.
Add the garlic, ginger, jalapeños and tomato paste. Cook for about 3 more minutes, just until very fragrant and the tomato paste begins to stick to the bottom of the pan. Add the curry powder, coriander and cardamom. Cook until very fragrant - only about 30 more seconds.
Add the diced tomatoes along with another generous pinch of salt. Cook, stirring every so often, until the tomatoes are softened and have released a lot of their moisture, about 5 minutes.
Stir in the lentils, coconut milk and 300ml (1¼ cups) of water. Bring to a simmer, reduce the heat to medium-low and simmer until the lentils are tender, cooked through and the sauce has thickened considerably, about 20 minutes. Taste to adjust for seasoning, adding salt and pepper where needed.
Stir in the roasted pumpkin and lemon juice and simmer for another 2-3 minutes. Serve immediately alongside some basmati rice, roti or naan.