Add chicken, onion, pepper, garlic paste, tomato purée, seasoning & paprika into the slow cooker. Stir well.
Cook on high for 1 hr 15 (or low for 2 hr 45).
Add pasta + milk, stir, then cook on high for 40 mins until pasta is cooked.
Top with cheese, lid back on for a few mins until melted. Stir & serve.
