Cast Iron Shakshuka with Feta and Kale (490 Cal, 34g Protein)

Five eggs nested in spiced crushed tomatoes deliver 34 grams of protein at 490 calories. The kale wilts into the sauce and adds 320 mg of calcium without the oxalate load of spinach — kale contains 2 mg of oxalate per 100g compared to spinach at 750 mg. The turmeric and black pepper go in with the spice base so the curcumin has fat from the eggs and olive oil to bind with. Feta crumbled on top after the broiler adds salt, zinc, and enough tang to cut the harissa heat.

Ingredients

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• 5 large eggs
• 1 cup crushed tomatoes (no salt added)
• 1/3 cup roasted red peppers, diced
• 1/4 cup yellow onion, diced
• 2 cloves garlic, minced
• 1.5 cups kale, stems removed and roughly chopped
• 1 oz feta cheese, crumbled
• 1 tsp harissa paste
• 1 tsp cumin
• 1 tsp smoked paprika
• 1/4 tsp turmeric
• 1/4 tsp black pepper
• 1 tsp olive oil

5 large eggs
1 cup crushed tomatoes (no salt added)
1/3 cup roasted red peppers, diced
1/4 cup yellow onion, diced
2 cloves garlic, minced
1.5 cups kale, stems removed and roughly chopped
1 oz feta cheese, crumbled
1 tsp harissa paste
1 tsp cumin
1 tsp smoked paprika
1/4 tsp turmeric
1/4 tsp black pepper
1 tsp olive oil

Instructions

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1. Preheat the broiler to high. Position the oven rack 6 inches from the element.
2. Heat the cast iron skillet over medium heat with 1 tsp olive oil. Add diced onion and cook 2 minutes until translucent.
3. Add garlic, cumin, smoked paprika, turmeric, and black pepper. Stir for 30 seconds until fragrant. The spices bloom in the oil — this is where curcumin absorption starts.
4. Add harissa paste and roasted red peppers. Stir to combine.
5. Pour in crushed tomatoes. Stir and bring to a low simmer over medium heat, about 3 minutes.
6. Add chopped kale and fold it into the sauce. Cook 2 minutes until wilted. The kale should be tender but still have structure.
7. Make 5 shallow wells in the sauce with the back of a spoon. Crack one egg into each well.
8. Cover the skillet and cook on the stovetop over medium-low heat for 5 minutes. The whites should be mostly set but still slightly translucent on top.
9. Remove the lid and transfer the skillet under the broiler. Broil for 2-3 minutes until the egg whites are fully set and the yolks are still runny. Watch it closely — the margin between runny yolks and hard yolks under a broiler is about 60 seconds.
10. Remove from the broiler. Crumble feta over the top. Serve directly from the skillet.

CRON Notes

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Lycopene from cooked tomatoes is more bioavailable than from raw. Heating ruptures the cell walls and converts trans-lycopene to cis-lycopene, which is more bioavailable after thermal processing. The fat from the egg yolks and olive oil further increases absorption — lycopene is fat-soluble and requires lipid co-ingestion for uptake.

Kale calcium absorption outperforms dairy on a per-calorie basis. Kale has a calcium absorption rate of roughly 41%, compared to milk at 32%. The low oxalate content means the calcium is not bound and sequestered the way it is in spinach or Swiss chard. One and a half cups of raw kale (which cooks down to a fraction of its volume) contributes about 135 mg of absorbable calcium.

Eggs as a B12 and selenium anchor. Five large eggs provide approximately 3.0 mcg of B12 — 125% of the daily value. Egg B12 bioavailability averages roughly 30% — lower than meat but sufficient when five eggs provide the volume. Selenium content reaches 60 mcg, covering 110% DV. Selenium is a cofactor for glutathione peroxidase, the primary endogenous antioxidant enzyme, and iodothyronine deiodinase, which converts T4 to active T3 thyroid hormone.

Curcumin with piperine and fat. The turmeric-black pepper combination is standard in this kitchen. Piperine increases curcumin bioavailability by 2000%. Adding it to a fat-containing dish further improves absorption because curcumin is lipophilic and requires micellar solubilization for intestinal uptake.