Given the task definition and input, reply with output. In this task, you will be presented with the directions of a recipe separated by "," and have to fill in the "___" which is a step that is missing from the recipe.

In a mixing bowl, combine the ricotta, cottage cheese, egg, Parmesan and spinach; season with salt and pepper.,______,Add 1 cup of the tomato sauce to the skillet and stir to combine with the sausage. On your cutting board, place 2 lasagna noodles side by side and use a spatula to cover them with 1/3 of the ricotta mixture. Using a larger spatula, transfer noodles to the center of the skillet. Scatter 1/3 of the artichokes on top, season with salt and pepper and top with 1/3 of the mozzarella. Add 1 cup of the tomato sauce and the 1/3 of the sausage. Repeat the layers 2 more times. Finish by tearing the remaining mozzarella slices and placing it on top along with the remaining sauce. Cover, adjust the heat, and simmer until the lasagna is cooked through and the cheese is bubbly, about 30 minutes.,Meanwhile, preheat the broiler. After the lasagna has cooked through, place the skillet under the broiler for 2 to 3 minutes, until the cheese is golden brown and crispy around the edges.,Garnish with additional Parmesan cheese and basil before serving.
In a 12-inch deep skillet, heat the olive oil over medium-high heat, then brown the sausage. Remove 1/3 sausage from the skillet to a paper towel lined plate.