Grilled Brussels Sprouts and Bacon

Name: Grilled Brussels Sprouts and Bacon
Ingredients: 1/3 cup extra-virgin olive oil, plus more for oiling the grill grates and drizzling; 2 pounds Brussels sprouts, trimmed, kept whole if small; halved through the stem if large; Kosher salt and freshly ground black pepper; 4 slices bacon (about 4 ounces), cut into 1-inch chunks; 2 tablespoons red wine vinegar; 2 teaspoons whole-grain mustard; 2 teaspoons honey; 1 small garlic clove, finely grated1/4 cup toasted hazelnuts, chopped; 1/3 cup parsley leaves