Rinse the basmati rice under cold water until clear. In a medium saucepan, combine rinsed rice with 1 cup coconut milk, 1 cup water, and a pinch of salt. Bring to a boil, reduce heat to low, cover, and simmer for 15-20 minutes until tender and liquid is absorbed.
Drain and rinse canned black beans. In a large skillet, heat 2 tablespoons olive oil over medium heat. Add black beans, 1/2 teaspoon garlic powder, 1/4 teaspoon salt, and 1/4 teaspoon pepper. Stir and cook for about 5 minutes until heated through.
In a mixing bowl, combine diced mango, finely chopped jalapeño, red onion, and juice of 1 lime. Toss gently and set aside to let flavors meld.
Assemble bowls by placing a scoop of coconut rice at the bottom, followed by black beans, then mango salsa. Sprinkle with roasted cashews and fresh cilantro leaves. Squeeze additional lime juice over the top.
Serve fresh and enjoy! These bowls can also be cooled and stored in the refrigerator for later.