1 tablespoon canola oil
12 ounces flank steak, cut diagonally across the grain into thin slices
1 red bell pepper, cut into thin strips
1 yellow bell pepper, cut into thin strips
3 tablespoons lower-sodium soy sauce
1 1/2 tablespoons rice wine vinegar
1 tablespoon minced peeled fresh ginger
2 teaspoons chili garlic sauce (such as Lee Kum Kee)
4 green onions, cut into 2-inch pieces
2 teaspoons toasted sesame seeds