Curried Shrimp Biryani

Name: Curried Shrimp Biryani
Cook time: 40 min
Total time: 40 min
Cuisine: Indian
Ingredients: 3 large shallots, halved and thinly sliced; 6 tablespoons unsalted butter, melted; Kosher salt; 1 pound large shrimp; 2 teaspoons finely grated peeled fresh ginger; 2 cloves garlic, finely grated; 2 teaspoons curry powder; 1 teaspoon garam masala; 1/2 teaspoon paprika; 4 8.8-ounce packages microwavable basmati rice (or 7 cups cooked rice); 1 cup fresh cilantro and/or mint, roughly chopped; Yogurt and chopped toasted cashews, for serving