Make the Marinade: In a large non-reactive bowl whisk together curry powder, salt, chilli flakes, turmeric, black pepper, apricot jam, brown sugar, lemon juice, Mrs Balls chutney, olive oil, red wine vinegar and thyme leaves until the sugar dissolves and the mixture is evenly combined.
Taste & Adjust: Spoon a little into a cup and taste. Add more chilli, chutney, jam, salt or lemon to balance to your liking—sweet, tangy, lightly spicy.
Marinate the Pork: Add pork cubes; toss to coat well. Cover and refrigerate 1 hour if rushing, 24–48 hours preferred (turn occasionally so all pieces stay coated).
Skewer: Thread pork cubes alternately with red & green pepper pieces and onion layers. (Add pineapple or dried apricot pieces if using.) Pack skewers in a shallow, sealable dish and pour any remaining marinade over. Cover and chill until braai time; turn every few hours if marinating longer than a day.
Bring to Room Temp: Remove from the fridge about 1 hour before cooking so the meat cooks evenly.
Prepare the Fire / Grill: Medium-high heat. Clean & oil the grid.
Grill & Baste: Shake excess marinade from each skewer (reserve marinade). Place on the grill; cook ~4 minutes then baste with 1/2 cup reserved marinade. Continue grilling, turning & basting until the pork is browned, lightly charred at the edges and just cooked through, about another 4–5 minutes (internal 63–65°C / 145–149°F, then rest).
Warm Remaining Marinade: Simmer the remaining marinade in a small saucepan for at least 3 minutes to a rolling bubble to ensure food safety before serving as a sauce. (Alternatively, boil & reduce to glaze.)
Serve: Transfer kebabs to a platter; rest 5 minutes. Drizzle or brush with the reduced warm sauce and scatter with extra thyme.