In a small bowl, combine diced mango, red onion, jalapeno, cilantro, and 1 tablespoon of lime juice to make the salsa.
Toss the shrimp with olive oil, chili powder, and 1 tablespoon of lime juice.
Grill the shrimp for 2 to 3 minutes per side until opaque and cooked through.
Assemble the bowls by dividing the cooked quinoa, sliced avocado, grilled shrimp, and mango salsa evenly among 4 bowls. Drizzle with remaining 1 tablespoon of lime juice before serving.