Preheat oven to 450°F. Bake waffle fries according to package directions.
Meanwhile, sprinkle patties with Greek seasoning. Cook, in batches, in a large nonstick skillet over medium-high heat 3 minutes per side or until no longer pink.
To assemble sliders, top each waffle fry (as the bun) with a mini burger; add a squirt of ketchup and mustard. Top with pickles. Serve open faced or add waffle fry as top bun.