Drain tuna, spoon it into a medium-sized bowl, add green onions, parsley, pimento, mayonnaise, Spicy Brown Mustard, cayenne ground pepper, and sea salt, and freshly cracked black peppercorns. Mix well. Adjust ingredients for taste.
Pull apart fresh lettuce leaves and Swiss chard, then arrange them on a plate.
Spoon 1 to 2 tablespoon of the Spicy Tuna Salad onto the lettuce and Swiss Chard center.
Add additional toppings like halved grape tomatoes, diced English cucumber, French's Crispy Fried Onions, and a quarter of a hard-boiled egg.