My Grandmother's Quick Chicken with Sweet Yellow

Ingredients

• 1 1/2 pounds (680 g) boneless, skinless chicken breasts
• 2 tablespoons (30 mL) olive oil
• 1 teaspoon (5 g) garlic powder
• 1 teaspoon (5 g) onion powder
• Salt and pepper to taste
• 2 large sweet yellow bell peppers, sliced
• 1 medium yellow onion, thinly sliced
• 2 cloves garlic, minced
• 1 teaspoon (5 g) dried oregano
• 1 tablespoon (15 mL) balsamic vinegar (optional)
• Fresh parsley, chopped (optional)