Place the ravioli in a bowl and pour the buttermilk over them. Let them soak for 15 minutes.
In a shallow bowl, mix breadcrumbs with Parmesan cheese.
Heat about 1 inch of vegetable oil in a deep skillet over medium heat until shimmering.
Remove each ravioli from the buttermilk, letting the excess drip off, and dredge in the breadcrumb mixture until fully coated.
Fry the ravioli in batches for 2-3 minutes on each side or until golden brown and crispy.
Remove and drain on paper towels.
Sprinkle with parsley and serve warm with marinara sauce.