Tex-mex Chicken 'n' Rice

• 4 chicken breast (halves skinless)
• 2 onions (chopped)
• 700 ml water (hot)
• 240 gr converted rice (white)
• 2 gr garlic pepper
• 1 package tomatoes (diced peeled)
• 1 package tomato paste
• 1 package chicken taco seasoning mix
• 1 package green chilies (diced)