Sheet-Pan Chicken Thighs with Brussels Sprouts & Gnocchi

Ingredients

• tablespoons extra-virgin olive oil, divided
• tablespoons chopped fresh oregano, divided
• large cloves garlic, minced, divided
• teaspoon ground pepper, divided
• teaspoon salt, divided
• pound Brussels sprouts, trimmed and quartered
• package shelf-stable gnocchi
• sliced red onion
• boneless, skinless chicken thighs, trimmed
• halved cherry tomatoes
• tablespoon red-wine vinegar