To prepare a vegetarian four cheese lasagna recipe, you will first need to prepare your ingredients. You will need: 1 1/2 cups ricotta cheese 1 cup mozzarella cheese 1/2 cup parmesan cheese 2 tablespoons olive oil 1 tablespoon thyme 2 teaspoons kosher salt 1 teaspoon pepper 1 tbsp. melted butter 1 chopped parsley sprig 1/4 cup chopped dill weed 1/2 teaspoon dried oregano 1/4 teaspoon ground nutmeg Instructions: Preheat the oven to 400 degrees F. Lightly grease an 8x8x2 inch baking dish with non-stick cooking spray and set aside. In the bowl of an electric mixer, cream the butter with the sugar until light and fluffy. Gradually add the eggs, beating well after each addition. Pour the mixture into the prepared dish and stir to combine. Bake in the preheated oven for 20 to 25 minutes or until the top is browned and the center is bubbling. Remove from oven and let stand for 5 minutes before serving.