Foryoueats: Weeknight Aloo Gobi Saag

1 tablespoon ghee (clarified butter)

1 onion, sliced

1 (3 inch) piece fresh ginger, grated, or to taste

1 clove garlic, crushed

6 fresh curry leaves

1 tablespoon cumin seeds

1 teaspoon black mustard seeds

1 teaspoon ground turmeric

4 potatoes, cut into 1-inch cubes

1 head cauliflower, cut into 1-inch cubes

2 red chiles, finely chopped

½ (14.5 ounce) can chopped tomatoes

1 (1 pound) package trimmed and chopped collard greens, or to taste

salt and ground black pepper to taste

Weeknight Aloo Gobi Saag