Preheat oven to 375°F and line 2 large baking sheet with aluminum foil. Brush the bread slices with olive oil and place on the prepared baking sheet. Place in the oven and toast for 5-10 minutes or until the crostini are nicely golden brown and crisp. Remove from the oven and set aside.

Place cream cheese, mayonnaise, scallions, sesame oil, soy sauce, vinegar, sambal, garlic, and ginger in the bowl of a food processor, blend until thoroughly combined and smooth. Transfer the mixture to a large bowl, add the crab meat, and gently fold together to combine.

Hot Preparation: Spoon approximately 2-3 tablespoons of the crab mix on to the prepared crostini, making sure to cover the crostini entirely in the mix. Place in the preheated oven and heat for 5-6 minutes or until the crab topping is a little bubbly and beginning to brown. Remove from the oven and garnish with a little sprinkle of chopped scallions and a tiny dollop or two of sambal (optional).

Cold Preparation: Spoon approximately 2-3 tablespoons of the crab mix on to the prepared crostini, making sure to cover the crostini entirely in the mix. Garnish the crostini with a little sprinkle of chopped scallions and a tiny dollop or two of sambal (optional).