betty's creamy italian chicken with potatoes

Ingredients

• 2 pounds chicken breast, skin removed and cut in half or thirds if they are really big (1 kilo)
• 1 large onion, sliced as fine as you can
• 2 teaspoons minced garlic
• 1 cup roasted peppers (capsicums), sliced or chopped
• 2 pounds red potatoes, leave skin on, slice to about 1/3 an inch thick (about 1cm)
• 1 jar favourite pasta sauce
• 1/2 cup water to shake well with the sauce lid on and get all the contents out
• 1 cup creamed cheese
• oil spray