1. Step
Heat oil in a large, high-sided skillet or Dutch oven over medium-high heat. Add chicken; cook, stirring often to break up the meat, until cooked through and beginning to brown, 6 to 8 minutes. Add onion, tomatoes, Italian seasoning and salt; cook, stirring often, until the onion is softened and the tomatoes are breaking down, 4 to 5 minutes.