For the peanut butter filling:In a medium-sized bowl combine the peanut butter, coconut oil, and honey; whisk well to combine. Season to taste, adding more honey and salt, if desired. Set aside.For the chocolate coating:In a medium-sized microwave safe bowl combine the chopped chocolate and coconut oil. Melt, using the microwave set on low, in 20 second increments, stirring in between, until completely melted. Whisk smooth and set aside.Assembly:Line two 12-mold muffin tins with paper liners. Fill each mold with 2 teaspoons of melted chocolate. Top each with a teaspoon of peanut butter filling, then top with another teaspoon or so of melted chocolate. Sprinkle with sea salt, if using, then place pans in the fridge for 20 minutes, or until chocolate has set. Serve at once, or keep stored in the fridge, in an airtight ziplock bag, for up to two weeks.