Sparkling Passion Fruit and Pineapple Margaritas

Add the fresh pineapple, pineapple juice (or passion fruit juice if you can find it), lime juice, and fresh lemon juice to the bowl of a large blender. Process until combined. Strain mixture through a fine mesh strainer and transfer to a large pitcher filled with ice.
Add the tequila, orange liqueur, and passion fruit pulp to the pitcher and stir to combine.
In a small bowl combine the salt and the sugar. Run a lime wedge around the entire rim of the desired number of glasses and rim each glass with the salt and sugar mix.
Divide margarita mixture between 6-8 glasses filled with ice, leaving room to fill with champagne. When ready to serve, top with champagne and garnish with fresh mint, pineapple wedges, and fresh lime, if desired.