Prep and Marinate: Preheat your BBQ to 450°F (232°C) or high heat. In a small bowl, combine the minced garlic, sea salt, and extra virgin olive oil. Using a silicone brush, generously coat the cut sides of the corn, cabbage, endives, radicchio, peppers, and tomatoes with the marinade.
Grill the Vegetables: Place the Vegetables brushed-side down on the hot grill. Leave the lid open and grill for 3 to 5 minutes until slightly charred. Brush the uncharred sides with the remaining marinade, flip, and grill the other side. Remove all vegetables (except the corn) and set aside to cool slightly.
Finish the Corn: Continue turning and grilling the corn until it is fully cooked and tender (about 10 minutes total). Set aside to cool.
Mix the Dressing: In a small bowl, whisk together the fresh dill, Icelandic yogurt, honey, lemon juice, sea salt, and chicken bouillon powder until perfectly smooth.
Assemble and Serve: Slice the grilled cabbage, peppers, radicchio, and endives into strips and layer them into a large serving dish. Slide the tomatoes off their skewers and scatter them on top. Cut the kernels off the corn cob and sprinkle them over the dish. Drizzle 3 tablespoons of the dill yogurt dressing over the salad, adding more to taste. Toss gently, garnish with extra fresh dill, and serve warm or at room temperature. Alternatively, serve the dressing on the side.