Preheat oven to 350°. Prepare the baking sheet by lining it with parchment paper.
In a stand mixer (or a large mixing bowl with an electric mixer), cream together the vegan butter and the brown sugar.
Add the molasses and vanilla extract and mix thoroughly.
Add the flour, salt, cinnamon, nutmeg, and baking soda and mix until combined.
Fold in the oats and the raisins. It might be easier to use your hand to mix everything together.
Roll the dough into balls and place on the prepared cookie sheet.
Bake for about 13 minutes. Take the pan out and let the cookies rest for about 3 minutes before placing on the wire rack to cool completely. The cookies hold their round shape. If you want a flatter cookie, gently press down with the back of a spoon once they're out of the oven.
Store cookies in an airtight container for up to 3-5 days.
Notes
You'll notice that the cookies have a round appearance when taken out of the oven. If you prefer a flatter cookie, use the back of a spoon and gently press down on the cookies just a little bit. You can do this once they're out of the oven but before you put them on the cooling rack.