Preheat oven to 350°F and set aside a 9x13-inch baking dish.

Beat cream cheese with an electric mixer until smooth. Add mayo and sour cream and continue beating until light and fluffy. Mix in onion powder, garlic powder, fresh chives, and parmesan cheese.

Transfer mixture to a ziptop bag and snip off the bottom corner. Pipe a generous dollop onto 24 of the crackers and arrange in a baking tray.

Top each one with a slice of salami, followed by another cracker to form a sandwich.

Mix together melted butter, garlic, ground mustard, parsley, and a pinch of salt. Pour over cracker sandwiches.

Bake until tops are golden brown, about 10 minutes. If desired, sprinkle with fresh chives before serving. Enjoy!