Set the oven to gas mark 6 or 200°C. Cut peppers into strips and the courgettes into sticks or rings. Mix in a large roasting tin with the onion, the cumin seeds, oil and the chipotle paste.
Roast the vegetables for 20-25 mins, until slightly charred.
Add rocket and seasoning to taste and mix until just combined. Squeeze in the juice from 2 of the lime wedges. Take pan to the table or transfer to a hot dish.
Serve with warm tortillas and the rest of the lime wedges, and the tomato salsa, guacamole, sour cream and grated cheddar cheese.