Place chillies, garlic, cumin and EVOO into the Thermomix bowl and chop 5 sec/speed 6. Scrape down sides of bowl and sauté 6 min/Varoma/speed 1. Add tomatoes, salt and sugar to bowl.
Prepare potatoes by slicing into 1 cm thick slices (without peeling) and placing into steamer dish. Set steamer into position and steam over sauce as you cook 20 min/Varoma/speed 3.
Place potatoes into an oiled ovenproof dish and set aside. Scrape out sauce and set aside. Rinse bowl.
Preheat oven to fan-forced 160°C.
Place red onions, chorizo and lime juice into the Thermomix bowl and chop 8 sec/speed 8. Scrape down sides of bowl and cook 7 min/Varoma/speed 1.
Spoon across potatoes. Top with tomato sauce and spread evenly.
Slice tomatoes in half and arrange across the top of the sauce.
Place eggs, cream and seasoning into the Thermomix bowl and blend 10 sec/speed 10.
Pour over chorizo and tomatoes. Bake for 50–60 minutes or until puffed and golden, and set in the centre.