Nimbu ka Sharbat (North Indian Spiced Limeade) | Saveur

Ingredients

• 3 ⁄ 4 cup fresh lime juice, plus sliced lime for serving
• 1 ⁄ 3 cup packed mint leaves, plus sprigs for garnish
• 1 ⁄ 3 cup sugar
• 1 ⁄ 2 tsp. grated kala namak (black salt; optional)
• 1 ⁄ 2 tsp. kosher salt
• 1 ⁄ 4 tsp. amchoor powder (dried, green mango)
• 1 ⁄ 4 tsp. freshly ground black pepper
• 1 ⁄ 4 tsp. ground cumin
• 4 cups seltzer or water, chilled