01 - Melt chocolate in a heatproof bowl set over gently simmering water using the double boiler method, stirring until completely smooth. Spoon melted chocolate into silicone egg molds, swirling to coat sides evenly. Chill in refrigerator for 10 minutes to set. Apply a second chocolate layer for added strength, then refrigerate until shells are firm, about 15 minutes.
02 - Combine diced strawberries and granulated sugar in a small bowl. Allow to rest for 10 minutes to draw out juices and soften the fruit.
03 - Using an electric mixer or hand whisk, beat cold heavy cream with powdered sugar and vanilla extract in a medium bowl until stiff peaks form. Gently fold in the crushed shortcake biscuits and macerated strawberries until evenly incorporated.
04 - Carefully unmold the chocolate egg halves from the silicone molds. Spoon strawberry shortcake filling generously into one half of each egg, then gently press the second half on top to seal. If needed, use a touch of melted chocolate to bond the edges together. Handle delicately to prevent cracking.
05 - Drizzle filled eggs with melted chocolate, then garnish with sprinkles, edible glitter, or colored icing as desired. Chill assembled eggs until ready to serve.