Cut the avocados in half, remove the pits, and scoop the flesh into a mixing bowl. Add the lime juice, garlic powder, chili powder, and salt. Mash with a fork until the mixture is mostly smooth but still has a few small chunks.
Place the mashed avocado in a small bowl and set it in the center of a large serving board.
Arrange the salami slices in loose folds around the bowl of mash.
Scatter the cheddar cubes on one side of the board and the black olives on the other side.
Add the carrot sticks and celery sticks in separate piles to create color contrast and crunch.
Fill in the remaining spaces with crackers, then tuck the parsley sprigs around the edges for a simple green accent.