Mix the graham cracker crumbs with melted butter and salt until the mixture resembles wet sand.
Press the crumb mixture evenly into the bottom and up the sides of a 9-inch tart pan to form the crust.
Bake the crust in a preheated oven at 180°C (350°F) for about 10 minutes, until fragrant and slightly golden.
While the crust cools, warm the peanut butter slightly so it’s easier to spread. Mix it with honey and vanilla until smooth.
Spread the creamy peanut butter mixture evenly over the cooled crust, then place the tart in the fridge for 15 minutes to set.
Heat the heavy cream just until it begins to simmer, then pour it over the chopped dark chocolate in a bowl.
Let sit for 2 minutes, then stir until the ganache is smooth and glossy, with a deep chocolate aroma.
Pour the ganache over the chilled peanut butter layer, spreading evenly with a spatula.
Chill the tart in the fridge for at least 2 hours, until the ganache is firm and shiny.
Before serving, sprinkle with chopped peanuts or drizzle with melted chocolate for decoration.
Slice with a sharp knife, wiping it clean between cuts for neat pieces, and enjoy this rich, nostalgic dessert.