Marinate brain, with dayap juice for at least 2 hours in refrigerator.
Season with salt and pepper, then poach or steam until cooked. Cut into cubes.
Heat 2 tablespoons olive oil or lard and saute garlic, onion and brain. Season to taste.
Pour beaten egg over brains, fold in contents and flip.
Add more oil if desired. Take care not to overcook the egg.