Creating a delicious Sweet Potato Casserole is simple when you follow these easy steps:

1. Preheat your oven to 350°F (175°C).
2. Boil the Sweet Potatoes: Peel and cut the sweet potatoes into chunks. Boil them in a large pot of water until tender, about 15-20 minutes.
3. Mash the Sweet Potatoes: Drain the sweet potatoes and return them to the pot. Use a masher to get a smooth consistency.
4. Mix in Ingredients: Add granulated sugar, melted butter, milk, eggs, vanilla extract, ground cinnamon, and salt to the mashed sweet potatoes. Mix until everything is well combined.
5. Transfer to Baking Dish: Pour the sweet potato mixture into a greased 9×13 inch baking dish, spreading it evenly.
6. Prepare Topping (Optional): In a small bowl, mix chopped pecans with brown sugar. If using, sprinkle mini marshmallows on top of the sweet potato mixture, then add the pecan mix.
7. Bake: Place in the oven and bake for 30-40 minutes, or until the topping is golden brown and the casserole is heated through.
8. Cool and Serve: Remove from the oven and allow to cool for a few minutes before serving.

These straightforward steps will guide you in creating an irresistible Sweet Potato Casserole that will win the hearts and stomachs of everyone at the table!