sheet pan chicken tikka

Name: sheet pan chicken tikka
Cuisine: Asian, Indian
Ingredients: For the chicken; 1 3/4-inch piece of ginger, peeled and minced (see Note up top); 4 cloves of garlic, minced or pressed; 1 fresh green chili (I used a jalapeno), seeded and minced; 1/2 cup whole-milk yogurt; 1 teaspoon kosher salt; 1/2 teaspoon chili powder or cayenne, or adjusted to taste (I used 1/4 teaspoon); 1/2 teaspoon ground turmeric; 1/2 teaspoon ground cumin; 3/4 teaspoon granulated sugar; 1 teaspoon paprika; 1 teaspoon garam masala; 2 pounds chicken thighs, drumsticks or halved chicken breasts (all skin-on, bone-in); For the vegetables; 3 tablespoons olive oil; 1 1/4 pounds (about 4 medium) Yukon Gold potatoes, peeled if desired, cut into 3/4-inch chunks; 1 3/4 pounds (1 small or half a very large head) cauliflower, cut into 3/4-inch-wide florets; 1/2 teaspoon kosher salt; 1/2 teaspoon cumin seeds; To finish, if desired; A few thin slices of red onion; Lemon wedges; Dollops of yogurt; A few tablespoons roughly chopped cilantro, parsley or mint, or a mix therof