Preheat the oven to 425°F. Lightly grease a large rimmed sheet pan with avocado oil.
Cut the chicken thighs and breast tenders into approximately 1½-inch cubes. Pat dry with paper towels. Toss with 2 tablespoons avocado oil, mild curry powder, and kosher salt until evenly coated.
Arrange the chicken on one side of the sheet pan in a single layer. Pile the frozen basmati rice on the other side. Drizzle the rice with 1 tablespoon avocado oil and season lightly with salt. Nestle in 2–3 ice cubes if desired.
Roast for approximately 20 minutes, until the chicken is lightly golden and reaches 165°F. Check that the center of the rice also reaches 165°F because it shares a pan with raw chicken. Continue cooking as needed until everything is heated through.
Carefully transfer the rice to serving bowls or a platter. Leave the chicken on the sheet pan. Pour both pouches of Trader Joe's Tikka Vegetables over the chicken and toss to coat on the hot pan.
Spoon the saucy chicken over the rice. Finish with chopped cilantro and a generous dollop of plain Greek yogurt. Add thinly sliced scallions if desired and serve with optional warm naan.