- Step 1
Cook pasta in a saucepan of boiling salted water as per packet instructions. Drain and set aside to cool.
- Step 2
Meanwhile place steaks in a large glass or ceramic dish. Combine oil, vinegar, garlic and rosemary in a jug. Season with salt and pepper. Pour over steaks, tossing to coat. Set aside for 10 mins for the flavours to develop.
- Step 3
Place pasta in a large bowl. Whisk pesto and buttermilk to combine. Add to pasta and toss to combine. Add bocconcini, capsicum, olives and rocket. Season with salt and pepper. Toss to combine.
- Step 4
Heat a lightly oiled barbecue or chargrill over medium-high heat. Cook steaks for 2-3 mins each side for medium-rare or until cooked to your liking. Rest for 5 mins. Serve steaks with pasta salad and crusty bread.