Pepper-crusted beef rib with beetroot and wilted beetroot greens

Name: Pepper-crusted beef rib with beetroot and wilted beetroot greens
Prep time: 20 min
Cook time: 1 h 45 min
Total time: 2 h 5 min
Cuisine: Australian
Ingredients: 1 bunch Dutch carrots, trimmed, scrubbed, large ones halved; 2 Spanish onions, cut into wedges; 120 ml olive oil; 1 dry-aged beef rib (about 2.4kg); 2 tsp each white and black peppercorns; 2 tsp finely grated fresh horseradish; 2 garlic cloves, finely chopped; 2 bunches baby beetroot, trimmed, halved, leaves washed and reserved