This sweet potato, tomato, kale, and halloumi sheet tray is a delicious and nutritious vegetarian dish. The sweet potatoes are roasted until tender and caramelized, while the tomatoes add a burst of freshness. The kale is wilted and adds a pop of green, and the halloumi cheese is grilled until golden and slightly crispy. All the flavors come together to create a satisfying and flavorful meal.