Heat the oven to 450°F.
Put the cream cheese, Parmesan, olive oil, lemon juice, garlic, and crushed red pepper in a large bowl. Season with salt and black pepper, and stir to combine.
Stir in the artichoke hearts and spinach.
Transfer to an 8- or 9-inch square pan or a gratin dish and bake until golden brown, about 20 minutes. Serve hot.
