Line the recesses of the muffin tray with one paper baking tin each. Melt the butter in a small pot and let it cool down a little. Seal crackers well in a freezer bag and crush them finely with a cake roll, a bottle or the bottom of a cooking pot.
Mix the crumbs with liquid butter. Spread the crumb mixture over the moulds and press it evenly with the back of a teaspoon to form a flat base. Chill for about 15 minutes.
Finely puree nuts and oil in a high mixing bowl with a powerful hand blender. Gradually stir in coconut milk and lime juice. Divide the chocolate into pieces, place in a bowl and melt over a warm water bath.
Spread half of the cream on the cracker bases. Spread the melted chocolate in the middle of each cracker base. Finish with the rest of the cream. Put 1 teaspoon of lemon curd on each cupcake and gently swirl with a wooden skewer.
Then it's off to the freezer for four hours. Done!