Sauté oil and onion in a large pan. Add garlic, aji panca, tomato, salt and pepper.
Add water, bouillon cube, squash, olluco, carrot, mint and oregano. Bring to a boil, reduce heat and simmer, covered, for 20 minutes.
Add rice, peas, potato and fava beans. Simmer covered for 10 minutes.
Add corn and simmer for 10 minutes more.
Finally pour milk and beaten eggs slowly. Add cheese.