In a large mixing bowl, whisk together the yogurt, 1 Tbsp fresh lemon juice, 1 tsp lemon zest, garlic, ginger, jalapeño, 1 tsp each India spice and kosher salt and ½ tsp ground turmeric. Season the chicken on all sides with kosher salt and transfer to the marinade. Toss until the chicken is well coated on all sides. Refrigerate for at least 2 hours, up to overnight (the longer the better)!\nPreheat the oven to 425 degrees. \nCut the cauliflower into ¾-inch thick slices, then cut into small florets. (Slicing the cauliflower first, rather than chopping it into florets, helps ensure it gets evenly browned and crispy on both sides). Toss with 1 Tbsp olive oil, 1 tsp kosher salt and ½ tsp each India spice and turmeric. Spread in an even layer on a large baking sheet. Slice the remaining lemon into wedges for serving. \nRemove chicken from the marinade and nestle it, skin-side up, onto the baking sheet alongside the cauliflower. Transfer to the oven and roast until the chicken is cooked through and cauliflower is tender and lightly browned, about 30-35 minutes. If desired, increase the oven temperature to broil and broil on the upper oven rack for about 3 minutes, until the chicken skin and cauliflower are extra crispy. \nRemove chicken from the oven and transfer to a serving platter. Top with a dollop of yogurt and freshly torn mint and\/or cilantro leaves. Serve alongside fresh lemon wedges.