Spicy Chicken Tacos

corn tortillas

boneless, skinless chicken breasts, trimmed of fat and cut into thin strips

salt, or to taste

canola oil, divided

large onion, sliced

large green bell pepper, seeded and sliced

large cloves garlic, minced

jalapeño pepper, seeded and minced

ground cumin

prepared hot salsa, plus more for garnish

chopped fresh cilantro

Sliced scallions, chopped fresh tomatoes and reduced-fat sour cream, for garnish