Into a pan, pour the whole milk and the condensed milk, mix.
Add the corn starch mixed with 100g of milk and mix again.
Add the passion fruit juice powder (or any other flavor you like), mix nonstop over medium heat.
Let it gain consistency and turn off the heat.
Add the chopped cherries (optional), mix.
Grease a glass dish with a drizzle of oil and pour in the mixture. Let it chill in the fridge for 2 to 4 hours.