Prep: add pitted dates to a bowl and cover with boiling water. Set aside.
Make the crust: add cookies to a food processor and pulse until a fine, sand-like texture is achieved. Add to a bowl and stir in avocado oil and maple syrup. Add to a greased 9-9.5 inch tart pan and press evenly with your fingers or with the bottom of a measuring cup. Place in the freezer while you prepare the peanut butter filling.
Make the peanut butter filling: drain dates and add to a food processor along with peanut butter, fresh water, vanilla, and salt. Omit salt if using salted peanut butter. Remove crust from freezer and add peanut butter filling, using a spatula to smooth and spread evenly.
Make the chocolate topping: melt chocolate chips and coconut oil in a microwave safe bowl for 1 min - 1.5 min. Stir every 30 seconds to help it evenly melt. Pour onto the peanut butter filling and spread evenly with a spatula.
Top & chill: Top with crushed peanuts and sea salt flakes (and an additional drizzle of chocolate or peanut butter if desired). Place in fridge and let chill for 4-6 hours before cutting/serving.
Serve: To easily cut slices, run a large, sharp knife under hot water and dry quickly. Cut and repeat the process for each slice you make. Recipe yields 6-8 slices depending on size/how you cut. Enjoy as is or top with vegan whipped cream.