Italian Chicken Stir-Fry

Ingredients

• 2 tablespoons olive oil
• 1 pound boneless, skinless chicken breasts, cut in 1-cm wide strips
• 1/2 teaspoon salt
• 1/4 teaspoon black pepper
• 1 1/2 cups sliced, seeded red, green, or yellow bell peppers
• 1 1/2 cups sliced zucchini
• 2 cloves garlic, minced
• 1 cup cherry tomatoes, each halved
• 1/2 teaspoon dried oregano, crumbled
• 2 teaspoons balsamic vinegar