Combine the oil with the garlic, mustard and rosemary, brush the dressing over the salads and meat.
Grill the lemon over/on a medium heat (approx. 200°C) for approx. 10 mins., grill the salads alongside for approx. 8 mins. Remove both from the grill, arrange the salads on a platter, allow the lemon to cool slightly. Brush both sides of the bread with oil, grill with the meat for approx. 2 mins. on each side, remove from the grill. Cover the meat and leave to rest for approx. 5 mins. Carve the meat across the grain and serve on top of the salad. Season the salad and meat with salt.
Squeeze the juice out of the grilled lemon, puree with the remainder of the flesh, oil and basil, season. Drizzle the dressing over the salad. Serve with the grilled bread slices.