Toasted Garlic-Butter Ravioli with Spinach

Bring 12" sauté pan of water to a boil and generously season with salt. Prepare a rimmed sheet pan with parchment paper. Cook pasta according to al dente package directions. Remove ravioli using a slotted spoon and place in a single layer on the sheet pan. Discard water. Place the pan over medium heat. Add olive oil, butter, and garlic; sauté until butter begins to bubble, about 1 minute. Add red pepper flakes, 1 teaspoon salt, and 1/2 teaspoon black pepper; stir with a rubber spatula. Add half the ravioli and stir gently until well coated; immediately add balance of ravioli and repeat. Flip the ravioli gently as needed to prevent them from sticking. Cook ravioli until golden brown, about 5 minutes. Toss in spinach gently. Garnish with parsley and grated cheese. Serve immediately.