Cook 2 bunches broccoli rabe in a steamer basket until tender, 7 minutes. Meanwhile, cook 2 sliced garlic cloves in a pot with 1 tablespoon olive oil until golden; add 1/4 cup sliced jarred cherry peppers and 2 tablespoons liquid from the jar. Toss in the broccoli rabe and salt and pepper. Drizzle with olive oil and top with shaved parmesan.