Chicken Veggie Fajitas

Ingredients

• 3 tablespoons lemon juice
• 1 tablespoon soy sauce
• 1 tablespoon Worcestershire sauce
• 2 teaspoons canola oil
• 1 garlic clove, minced
• 1/2 teaspoon ground cumin
• 1/2 teaspoon dried oregano
• 3/4 pound boneless skinless chicken breasts, cut into 1/2-inch strips
• 1 small onion, sliced and separated into rings
• 1/2 each medium green, sweet red and yellow pepper, julienned
• 4 flour tortillas (6 inches), warmed
• Shredded cheddar cheese, optional