Uni Shooter with Ponzu Sauce

Recipe from Mount Dora Sushi

1 piece very fresh, firm Uni (Sea Urchin from California, Canada-New Brunswick)
1 Quail egg yolk only
1 drop Sriracha hot chili sauce
1 tablespoon Ponzu Sauce (equal parts soy sauce, mirin, rice vinegar, and splash lemon juice)

In a shot glass or martini glass, layer the ingredients in the order that they appear in the list.