To make mint simple syrup: Combine sugar and water in a small saucepan, heat until sugar melts.
Remove from heat, add the tea bag and let steep for 5 minutes.
Cold syrup.
(Simple syrup can be stored in the refrigerator for a month.)xa0
In a food processor, puree diced mango until smooth.
To assemble, place the raspberries in a glass.
Top with 2 tablespoons mint simple syrup, mango puree, and Prosecco.
Garnish with a slice of mango and mint.
This drink can be served in a variety of glasses, from a rocks glass to a martini glass.