Heat 2 tbsp olive oil in a large saucepan over medium-high heat. Add onion and garlic, and cook for 4-5 minutes, stirring often, until lightly browned.
Add chorizo, fennel and capsicum, followed by smoked paprika, coriander and cumin seeds. Stir to combine, then cook for another 5 minutes, stirring often, until chorizo has lightly browned and spices are fragrant.
Add tomato paste and stir through, then add vegetable stock and tomatoes. Cover with a lid, reduce heat to medium-low and simmer for 25 minutes.
Add prawns, fennel fronds, lemon juice and zest, and salt. Simmer for a further 3 minutes until the prawns have turned white and are cooked through.
Serve hot, with bread and rice if desired.
Olivia Moore and her Taupō business That Green Olive offer recipe development, food photography - in studio or on-location - for restaurants and cafes, recipe video creation and social media content creation.