BBQ Chicken Pizza

• 1 wholemeal pita
• 200 g rotisserie chicken, shredded
• 1 red capsicum (pepper), thinly sliced
• 100 g white mushroom, thinly sliced
• .25 red onion, thinly sliced
• .25 cup cheddar cheese, grated
• 3 tbsp bbq sauce, salt and sugar reduced
• 1 cup spinach, finely shredded