Pre heat oven to 210c ff / 410 f
Place peppers / capsicums on a large baking tray cut side up and brush lightly with 1 1/2 tsp olive oil. Toss the chopped potatoes in the remaining 1 1/2 tsp of olive oil and spread in an even layer on the baking tray beside the peppers/capsicums.
Bake for 15 mins or until peppers / capsicums start to soften and blister slightly, and they potatoes are lightly browned.
Meanwhile, in a bowl mix together cooked lamb, chopped sundried tomatoes, basil, feta and sundried tomato oil (if using or sub with olive oil - see my notes) and set aside.
Once peppers and potatoes are cooked, place cooked potatoes into the bowl with the lamb mixture, and mix to combine.
Check to see if the peppers have generated any moisture - if they have remove it with paper towel / kitchen paper.
Stuff pepper halves with lamb & potato mixture, and bake for a further 10 mins or until lamb is heated through.
Serve immediately topped with a generous amount of greek yoghurt.