Bring ingredients to room temperature where possible (eggs, tomatoes, feta out for 10 minutes). This helps the eggs cook evenly and condensed flavors in cold tomatoes dissipate — small step, big payoff.

Heat a 12-inch (30 cm) heavy skillet (cast iron preferred) over medium heat. Add 2 tablespoons (30 ml) of the olive oil. Cast iron gives even heat and helps develop fond on the vegetables that deepens the sauce flavor.

Add the sliced onion and a generous pinch of salt. Cook, stirring occasionally, 6–8 minutes until soft and translucent and the edges begin to caramelize. Sweating the onion slowly releases its sugars and creates the sweet base for the tomato sauce.

Add the diced red pepper and continue to cook 4–5 minutes until softened. The pepper adds brightness and a gentle sweetness that balances the tomato acidity.

Push the veggies to one side of the pan. Add the remaining 2 tablespoons (30 ml) olive oil to the empty side, then add the smoked paprika and ground cumin and toast 20–30 seconds until aromatic. Toasting spices in oil blooms their flavor — you’ll smell a nutty, smoky perfume.

Stir the spices into the vegetables, then add the minced garlic and cook 30–45 seconds — garlic becomes bitter if overcooked, so short time here keeps it bright.

Add the crushed San Marzano tomatoes, harissa paste (if using), and ½ teaspoon salt (adjust later). Bring to a gentle simmer and cook uncovered 8–10 minutes to reduce and concentrate the sauce. Simmering breaks water down and concentrates tomato sweetness and acidity into a fuller flavor.

Stir in the chopped kale, pushing it down into the sauce so it wilts and becomes coated. Cook 3–4 minutes until the kale is tender but still bright green. Adding kale at this stage lets it soften without losing structure or turning mushy.

Taste and adjust seasoning with salt and cracked black pepper. If the sauce tastes too acidic, balance with a pinch of sugar or a drizzle of olive oil — small adjustments make the flavors harmonize.

Make four shallow wells in the sauce using the back of a spoon. Crack two eggs into a small bowl and gently slide them into each well (two eggs per serving). Using a bowl prevents shells and lets you place eggs precisely where you want them.

Reduce heat to low, cover the skillet, and cook 6–9 minutes until egg whites are set and yolks reach desired doneness (6–7 minutes for a runny yolk, 8–9 for jammy). Covering traps steam and gently poaches the eggs without overcooking the sauce.

While eggs cook, brush sourdough slices lightly with olive oil and toast in a pan or under the broiler until golden and crisp (2–3 minutes per side in a skillet). Rub the warm toasts with a cut garlic clove, if desired — the heat will mellow the garlic for a subtle, aromatic finish.

Scatter crumbled feta and chopped parsley over the finished shakshuka, drizzle with a little extra virgin olive oil and a grind of black pepper. The salty, creamy feta contrasts the tangy tomato and the parsley adds a fresh lift.

Serve straight from the skillet with toasted sourdough on the side for scooping. Encourage diners to break yolks with their toast and sweep through the sauce — that texture contrast is the point of the dish.