Preheat the oven to 425°F (220°C). Arrange a rimmed baking sheet in the oven to heat for 3–5 minutes. Preheating the sheet and oven gives the sweet potatoes an immediate hot surface to sear against, encouraging caramelization instead of steaming.

Toss the 800 g cubed sweet potato with 2 tbsp olive oil, 1 tsp smoked paprika, 1/2 tsp ground cumin, 1/2 tsp salt (from the total), and a generous grind of black pepper. Spread the cubes in a single layer on the hot baking sheet—give them a little space so each cube can brown. Roasting at high heat with space between pieces concentrates sweetness and creates crisp edges while keeping the centers tender.

Roast the sweet potatoes for 20–25 minutes, turning once halfway through. You're looking for deep golden-brown edges and fork-tender centers. If you want extra caramelization, broil for 1–2 minutes at the end—watch closely to avoid burning.

While the sweet potatoes roast, prepare the chickpeas: drain and transfer 480 g canned chickpeas to a clean kitchen towel or paper towels and pat very dry. Remove any loose skins. Drying is crucial—moisture prevents the chickpeas from crisping and creates steam that makes them soft rather than crunchy.

Heat a large heavy skillet (cast iron or stainless steel) over medium-high heat and add 1 tbsp olive oil. When the oil shimmers, add the dried chickpeas in a single layer. Let them sit undisturbed 2–3 minutes to begin browning—this initial contact forms a crust. Then toss and continue to cook 6–8 minutes until they blister and darken in spots. Browning concentrates flavor and adds welcome texture contrast against the soft sweet potato.

When chickpeas are beginning to color, sprinkle 1/2 tsp smoked paprika, 1/4 tsp ground cumin and a pinch (or the desired amount) of chili flakes over them; toss so spices bloom and adhere. Blooming spices in hot oil releases their essential oils and magnifies aroma and flavor.

Season chickpeas with 1/4 tsp salt and a few grinds of black pepper. Transfer chickpeas to a bowl and set aside—they will crisp further once removed from the pan and will be tossed back into the hash later.

In the same skillet, add the remaining 1 tbsp olive oil over medium heat. Add the minced garlic (4 cloves) and cook 20–30 seconds until fragrant—don't let it brown. Then add the chopped 160 g kale and a pinch of salt. Sauté 3–4 minutes, stirring, until the kale wilts but stays bright green. Cooking kale quickly at a moderate temperature keeps it tender and preserves vibrant color; the little bit of garlic and lemon will brighten the bitter greens.

Add 4 tsp lemon juice to the kale along with most of the chopped parsley (reserve about 1 tbsp for finishing). Toss to combine and cook another 30 seconds. Acid (lemon) wakes up the flavors and helps balance the smoky, sweet elements in the hash.

Combine: add the roasted sweet potatoes to the skillet (or return everything to the warm baking sheet) with the crisped chickpeas. Gently fold the components together on medium heat 1–2 minutes so the flavors marry—avoid overworking the sweet potato cubes to keep their shape. Taste and adjust seasoning (add remaining 3/4 tsp salt evenly across the total if needed and more pepper).

Finish: remove from heat and stir in the remaining chopped parsley and 2 tsp lemon zest. The fresh zest provides a bright perfume that lifts the whole dish; adding it at the end preserves delicate citrus oils.

Serve warm, dividing into 4 portions. Offer extra lemon wedges and chili flakes at the table. The dish stands alone as a satisfying vegetarian main or pairs nicely with a fried egg, grilled halloumi, or a spoonful of yogurt for contrast.