Grill Vegetables

1. Remove the seeds and the pith from the peppers. Cut into quarters
2. Cut onion into quarters
3. Grill over high heat for 5-6 minutes, or until tender, turning often to grill all sides. If you do not have a grill, preheat oven to 475º and cook on a baking sheet until tender, about 8-9 minutes

Make Vinaigrette

1. Meanwhile, in a mixing bowl, whisk together all vinaigrette ingredients except the olive oil. Slowly drizzle in the oil while whisking vigorously to form an emulsion. It helps to stick a towel under the bowl while mixing to prevent it from sliding around. Set aside

Assemble & Dress Salad

1. Remove vegetables from grill and slice into smaller pieces (according to preference)
2. Add to a large bowl with parsley, minced garlic, cumin, salt and radicchio
3. Toss with dressing according to taste, and transfer to a platter to serve. If serving later, chill the salad and the dressing separately and dress right before serving