Brat and Pepper Tacos

3/4 lb Bratwurst, halved lengthwise and sliced crosswise into 1/3 -inch-thick pieces

• 1 bunch Scallions or Green Onions
• 2 Poblano Chiles, halved seeded and sliced
• 1 Red Bell Pepper, sliced
• 3 tbs Olive Oil
• 1 ripe Mango
• Kosher Salt, to taste
• Pepper, to taste
• 12 Corn Tortillas, warmed
• Cabbage