Slow Cook Sweet& Sour Pork

• 2 green peppers (cut into)
• 1 onion (sliced)
• 525 gr cubed pork
• 60 ml vinegar
• 55 gr brown sugar
• 45 ml soy sauce
• 16 gr cornstarch
• 1 gr ginger
• 2 slices tomato in (cut)