1. In a small saucepan, bring 2 1/2 cups of milk to a boil. In a bowl, combine the remaining milk, cornstarch, sugar, and vanilla, and stir. Once the milk boils, add the cornstarch mixture and stir until it thickens.
2. Lower the heat and continue stirring for 1 minute. Add the orange blossom water and cherry jam, then remove from heat.
3. Pour the milk mahalepi into a heatproof dish and once it cools, place it in the refrigerator. Garnish with fresh cherries and serve. If you'd like more pudding, simply multiply the ingredients!