In a small bowl, whisk together custard powder and ¼cup of milk.
In a medium heavy bottom pan, combine the remaining milk and sugar. Bring the mixture to a boil, lower the heat and stir in the custard powder mixture. Stir continuously and cook on low flame until the mixture starts to thicken, about 2~3 minutes.
Let he mixture cool completely. Chill for at least 4 hours before serving.
Make the Praline:
Preheat the oven to 350°F. Line a baking sheet with parchment paper and spray with cooking spray.
Combine nuts, brown sugar and honey in a small bowl. Mix well to make sure that the nuts are evenly coated.
Place the nut mixture on the baking sheet. Bake for 7~10 minutes or until the sugar is caramelized and the nuts are toasted. Stir them once in the middle. Remove from the oven onto a wire rack and let cool completely.
Once cooled, break the praline into small pieces.
To Assemble the dessert:
Divide the custard between serving bowls. Add warm jamuns in each bowl and top with the chopped praline. Serve immediately!!