Red and Green Stuffed Shells

Turn the heat to medium-low, then, in the same skillet, melt the butter and sprinkle the flour over the top. Whisk it together to make a roux, then cook it for a minute or two. Slowly add the milk, whisking out lumps as you go, and cook it until the white sauce is thickened, 4 to 5 minutes. Turn off the heat and stir in half the basil, half the parsley, and salt and pepper to taste. Add another 1/4 cup milk if the white sauce is too thick. Taste and adjust the seasonings. In a separate bowl, mix together the ricotta, Parmesan, egg, the rest of the basil, the rest of the parsley, and salt and pepper to taste until combined. Stir in the chopped spinach mixture. To assemble the shells, use a spoon to fill the pasta shells with the cheese mixture. Place the shells seam side down in a 9 x 13 casserole dish or disposable foil baking pan. Pour the marinara evenly over the shells, then ladle the white sauce over the marinara in a zig-zag/line design. Finally, sprinkle with more Parmesan. Bake it in a preheated 375 degrees for 25 to 30 minutes, until hot and bubbly.