Make Pistachio Paste: Pulse pistachios in a food processor until it turns into a soft paste. Avoid overheating by letting it rest in the refrigerator or freezer for 10 minutes if needed, then pulse again.
Prepare Roasted Kadayif: Separate angel hair kadayif strands. Toss them in melted butter and roast in the oven for 15 minutes. Let cool.
Make Pistachio Spread: Process the pistachio paste with a pinch of flirtel oil, melted white chocolate, and almond extract until smooth.
Combine Pistachio Spread with Kadayif: Add the roasted kadayif to the pistachio spread and mix gently to combine, creating the crunchy pistachio interior.
Prepare Chocolate Mold: Spray the chocolate mold with a film of tempered cocoa butter or a mixture of chocolate and cocoa butter, optionally colored with red colored dark chocolate cocoa butter mixture, to create a vibrant finish.
Create Milk Chocolate Shell: Fill the mold with tempered milk chocolate. Tap on the countertop to remove air bubbles. Let stand for about 3 minutes, then invert mold to drain excess chocolate. Scrape excess chocolate and let rest upside down until set to the touch. Scrape again to even the shell thickness.
Fill Chocolate Shells: Fill the prepared chocolate shells with the crunchy pistachio and kadayif interior.
Add Final Chocolate Layer: Cover the filled shells with tempered milk chocolate. Scrape excess chocolate and chill the mold before unmolding.