Boil the Eggs. Bring a pot of water to a boil. Carefully lower in the eggs and cook for 10 minutes until the yolks are fully set but still creamy. Transfer immediately to an ice bath and cool completely before peeling.
Marinate the Eggs. In a bowl, mix soy sauce, mirin, rice wine vinegar, sesame oil, sambal, and Korean chili flakes. Place the peeled eggs in a container, pour the marinade over them, and add water until fully submerged. Marinate for 45 minutes to lightly season the egg whites.
Make the Green Garlic Oil. Blend garlic chives and olive oil on high for about 5 minutes until the mixture becomes hot and steamy. This gently blanches the herbs and preserves the vibrant green color. Strain through a coffee filter for a clear oil, or refrigerate unstrained.
Prepare the Green Breadcrumbs. Mix panko breadcrumbs and green garlic oil, seasoning lightly with salt. Spread on a sheet tray and bake at 325°F (165°C) until dry and crispy, watching carefully so the crumbs stay bright green.
Cook the Portuguese Ham. Finely dice Portuguese sausage and cook in a skillet until the fat renders. Transfer to a 350°F oven and bake until crispy, similar to bacon bits. Let cool.
Make the Deviled Egg Filling. Slice the marinated eggs in half and remove the yolks. In a bowl, whisk the yolks with Kewpie mayonnaise, lemon juice, salt, and pepper until smooth and creamy. Fold in the crispy Portuguese sausage and transfer the mixture to a piping bag.
Assemble the Deviled Eggs. Spread the green garlic breadcrumbs onto a serving plate. Pipe the deviled egg filling into the egg whites and place them on top of the crumbs. Drizzle lightly with green garlic oil and finish with scallions or dried chives.