Preheat oven to 350°F and line the bottom of an 8 or 9-inch springform pan with parchment paper and set it on a baking sheet.
Place the dates in a small sauce pan and cover with water. Bring to a boil.
Reduce heat and simmer the dates for about 5 minutes, until softened.
Meanwhile, place the oats in a food processor and grind until a coarse flour forms.
Transfer oats to a small bowl and whisk in the sea salt. Set aside.
When the dates are soft, drain the water, put them in the food processor, and grind them until a paste forms. Then add the butter and blend until combined.
Scrape down the sides of the food processor and add the oat mixture. Grind until all the ingredients are well blended.
Transfer the dough into the prepared springform pan. Use an offset spatula to spread it out evenly to cover the bottom.
Bake for 15 minutes or until the top turns slightly golden brown. Remove from oven and cool before using with your favorite cheesecake recipe.