Grilled Pizza with Sausage & Peppers

Grill bell pepper and sausage, covered, over medium heat, turning often, until bell pepper is charred in spots and sausage is almost cooked through, about 10 minutes. Slice and seed bell pepper. Slice sausage. Stretch dough into 8-by-16-inch oval. Grill for 1 minute; flip. Top with tomato sauce, garlic, mozzarella, sliced bell pepper, and sausage. Grill pizza, covered, until crust is cooked through and charred in spots, about 12 minutes. Top with arugula and Parmesan.