Position racks in the upper and lower thirds of the oven and preheat to 425 degrees F. Toss the sweet potatoes and peppers with the olive oil, 1/2 teaspoon salt, and pepper to taste on a rimmed baking sheet; spread in a single layer. Bake on the lower oven rack until tender and charred in spots, about 35 minutes. Meanwhile, set a wire rack on another rimmed baking sheet and coat with cooking spray. Stir the mayonnaise, milk, chili powder and 1 teaspoon salt in a large bowl. Place the panko in another large bowl. Add the pork to the mayonnaise mixture and turn to coat. One at a time, transfer each cutlet to the bowl of panko and turn to coat; arrange on the wire rack. Coat both sides of the cutlets generously with cooking spray. Bake the cutlets on the upper oven rack until golden brown and cooked through, 12 to 18 minutes. Serve the pork with the roasted vegetables, salsa verde and lime wedges.