Dissolve tart jelly in half cup boiling water and let it cool down a little.
Add small pieces of strawberries and pour in ramekins to make a strawberry layer. Put the ramekins in freezer for about an hour to set the layer (You will opt for this step if you want to give your dessert a strawberry layer)
For Cream Layer
Dissolve 1 teaspoon of gelatin in 1/4th cup of milk.
In a pan cook cream and sugar till it is boiled
Remove from heat and add milk and gelatin mixture in it and mix it well. At this stage you can flavor your Panna Cotta as you desire e.g by adding coffee, chocolate etc.
Turn it back to heat so that gelatin is fully dissolved. Remove from heat and add vanilla essence. At this point you have two choices, either you can make a plain vanilla flavor, pour the cream in ramekin
Or you can pour the cream on strawberry layered ramekin as mentioned in Strawberry Layer section. By this you will get two layered Panna Cotta
Put the ramekins in refrigerator for 2 to 3 hours till it sets or you an put them in freezer if you want them to be set in less time
When the mixture is well set take out the ramekin and pass a knife around the edges as shown in picture
Invert the ramekin on serving plate and tap the ramekin gently so that the Panna Cotta comes out easily. If you face difficulty in taking it out then place the Ramekin in hot water for a while. This will also melt the upper layer a little to give your dessert a classy touch