Nando's Peri Peri Chicken Burgers

Bahan-bahan (4 porsi)

• 1 - 3 birds eye red chilies ((1 is very mild, 3 is mildly spicy) (Note 1))
• 1 medium red capsicum / bell pepper (, roughly cut into 1.5cm / 1/2" pieces)
• 5 g arlic cloves (, peeled, whole)
• 3 tbsp vegetable or canola oil (, or other plain flavoured oil)
• 4 tbsp malt vinegar ((Note 2))
• 2 tbsp smoked paprika ((substitute regular / sweet paprika))
• 1 tbsp dried oregano
• 2 tsp onion powder ((substitute garlic powder))
• 1 1/2 tsp white sugar
• 1 1/2 tsp cooking salt / kosher salt
• 3 drops red food colouring ((optional, Note 3))
• 3 tbsp Peri Peri Sauce ((above))
• 1/2 cup whole egg mayonnaise ((or other mayonnaise))
• 1/4 cup sour cream ((or yoghurt))
• 2 tbsp olive oil
• 4 chicken breasts or chicken thigh fillets (, skinless boneless (each large enough for a burger))
• 4 soft rolls (, split and lightly toasted (if desired))
• 2 tomatoes (, sliced)
• Lettuce of choice