Fresh Pineapple Margaritas

Bahan-bahan (4 porsi)

• 3 cups fresh pineapple chunks (about 1 pound)
• 1 cup fresh lime juice
• 1 cup tequila blanco
• 1/2 cup Cointreau (or any orange liqueur)
• 1/4 cup agave nectar (if needed to sweeten)
• coarse Kosher salt
• lime or pineapple wedges, for serving (optional)