Spicy Turkey and Veggie Tacos

Name: Spicy Turkey and Veggie Tacos
Ingredients: 1/2 pound turkey breast cutlet; 2 tablespoons ground black pepper; 1 teaspoon canola oil; 1 cup small tomatoes, quartered; 1 small red bell pepper, sliced; 1 small orange bell pepper, sliced; 2 jalapeños with seeds, sliced; 1/3 cup corn kernels; 1/4 cup cooked black beans; 2 tablespoons black olives, sliced; 1 scallion, chopped; 1/4 cup quick-pickled onion and radishes (see Note); 6 corn tortillas, warmed; Sour cream and lime wedges, for serving