In a bowl, dissolve the gelatin in 1/4 cup of the strawberry syrup you kept. Let sit 5 minutes.
Put the bottom of the bowl in hot water until the gelatin is dissolved completely. Incorporate strawberries and yogurt. Set aside.
In another bowl, whisk cream and sugar. Add it to the strawberries when the gelatin begins to set.
Pour in dessert dish bowls. Put in the fridge.
Strawberry sauce : Add enough water to the remaining strawberry syrup to obtain 1 cup of liquid.
Pour in a casserole. Let heat at low setting. Add the cornstarch mixed in a little bit of water. Stir until thick. Add the orange zest. Let cool down. Divide the mixture equally into the dessert dish bowls already in the fridge.