Bring a large pot of salted water to a boil. Add the pasta shells and cook according to package instructions until al dente. Drain and set aside.
In a small saucepan, melt the butter over low heat. Add minced garlic and cook for about 1.0-2.0 minutes until fragrant. Stir in the chopped parsley, basil, chives, and lemon zest. Season with salt and pepper. Remove from heat.
In a mixing bowl, combine ricotta, mozzarella, and Parmesan cheese. Add half of the herb butter, along with additional salt and pepper to taste. Mix until well combined.
Take a cooked pasta shell and fill it with about 1.0-2.0 tablespoons of the ricotta mixture. Repeat with all shells.
Spread about 1.0 cup of marinara sauce evenly along the bottom of a 9x13 inch baking dish. Arrange the stuffed shells on top and drizzle the remaining herb butter over them. Pour the remaining marinara sauce on top.
Cover with foil and bake in the preheated oven for 25.0 minutes. Remove the foil and bake for an additional 10.0-15.0 minutes until the cheese is melted.
Let cool for a few minutes, garnish with extra chopped parsley or basil, and serve warm.
Notes
Feel free to use store-bought marinara sauce or make your own.