Masala Mixed Nuts

Name: Masala Mixed Nuts
Ingredients: ¼ cup besan (chickpea flour); 2 tablespoons rice flour; 2 tablespoons corn flour; ½ teaspoon ground turmeric; ½ teaspoon Kashmiri chile powder (see note); ½ teaspoon garam masala; ½ teaspoon dried mint powder; ½ teaspoon store-bought ginger-garlic paste (available in Indian markets); Pinch of baking soda; 1 ½ teaspoons Himalayan or kosher salt, divided; 1 cup salted peanuts; ½ cup salted cashews; ¼ cup roasted salted almonds; ¼ cup roasted walnuts; 2 teaspoons canola or vegetable oil; ½ cup water, plus more as needed; Oil for deep frying; 1 teaspoon chaat masala