Wash and dry produce.
Trim, peel, and dice carrot into ½-inch pieces. Halve, peel, and dice half the onion (whole onion for 4 servings). Peel and mince garlic. Remove and discard any large stems from kale.
Heat a large drizzle of olive oil in a large pot over medium-high heat. Add carrot and diced onion; cook, stirring occasionally, until softened, 5-6 minutes.
Add another drizzle of olive oil, then stir in garlic, Tuscan Heat Spice, and half the garlic powder; cook until fragrant, 30 seconds.
Stir chickpeas and their liquid, diced tomatoes, veggie stock concentrate, mushroom stock concentrate, 3½ cups water (7 cups for 4 servings), and a big pinch of salt into pot with veggies.
Bring to a boil, then reduce to a low simmer; cook, uncovered, until carrot is just softened, 13-15 minutes.
Once carrot is just softened, stir in couscous and kale. Cover pot and cook until couscous is tender and kale is wilted, 7-9 minutes.
Uncover and stir in half the Parmesan (save the rest for serving). Taste and season generously with salt and pepper. Turn off heat.
Meanwhile, halve ciabatta.
Place 2 TBSP butter (4 TBSP for 4 servings) in a small microwave-safe bowl; microwave until softened, 10-15 seconds. Stir in remaining garlic powder and season with salt and pepper.
Toast ciabatta, then spread cut sides with garlic butter. Halve each piece on a diagonal.
Divide soup between bowls. Sprinkle with remaining Parmesan and serve with garlic ciabatta on the side.