Heat oil in a saucepan and fry onion until tender. Add garlic, cumin, oregano, salt, pepper and aji paste. Combine.
Blend bread slices with milk and add to onion mixture. Cook over low heat, stirring occasionally for 5 minutes.Add shrimp tails, nuts and the sufficient evaporated milk to form a thick cream.
Wait until shrimps are cooked and add parmesan cheese to taste.Add eggs and correct seasoning.Serve immediately. Serve with white rice and potato slices on the side. Sprinkle over with chopped parsley.