These fragrant collards are cooked with an Ethiopian-style spiced butter flavored with cardamom, fenugreek, and nigella seeds.
4 tbsp. unsalted butter
⅛ tsp. black cardamom seeds
⅛ tsp. ground fenugreek
⅛ tsp. nigella seeds
¼ cup extra-virgin olive oil
1 large yellow onion, minced
3 cloves garlic, minced
2 Thai chiles, stemmed, seeded, and minced
1 1" piece ginger, peeled and minced
1½ lbs. collard greens, stemmed and cut crosswise into ¼"-wide strips
Kosher salt and freshly ground black pepper, to taste
White wine vinegar, to taste
Heat butter in a 6-qt. pot over medium heat. Add cardamom, fenugreek, and nigella and cook, stirring often, until fragrant, 1–2 minutes. Increase heat to medium-high and add oil; add onions and cook, stirring often, until browned, 10 minutes. Add garlic, chiles, and ginger and cook, stirring often, until soft and fragrant, 3 minutes. Add collards, 1⅓ cups water, and salt and pepper; cover and bring to a boil. Reduce heat to low and cook, stirring occasionally, until collards are tender, 50–55 minutes. Stir in vinegar and serve collards hot.