What was the inspection type when El Aji Peruvian Restaurant got highest inspection score?
El Aji Peruvian Restaurant is the name of the business; highest inspection score refers to MAX(score);
SELECT T1.type FROM inspections AS T1 INNER JOIN businesses AS T2 ON T1.business_id = T2.business_id WHERE T2.name = 'El Aji Peruvian Restaurant' ORDER BY T1.score DESC LIMIT 1