Meanwhile, in a large non-stick frying pan over medium-high heat, heat oil for 1 min, or until hot. Add chorizo and cook for 2 mins, or until it begins to brown. Reduce heat to medium. Add capsicum and onion and cook for 5 mins, or until onions are translucent and tender. Stir in garlic and cook for 2 mins, until fragrant and tender. Stir in lemon zest and juice.