For the shrimp: Toss the shrimp with the canola oil, lime juice, chile powder, cumin, salt and pepper. Marinate the shrimp for 10 minutes. Preheat the grill pan to medium-high heat. Grill the shrimp for 4 to 5 minutes total, flipping once halfway through.
To assemble tostadas: Top each corn tostada shell with the shrimp, cabbage, jicama, radishes, avocado, onion and tomatoes. Drizzle with Marie's® Creamy Avocado Poblano Dressing. Garnish with the cilantro. Serve with lime wedges and hot sauce.