This recipe is from the Indian state of Gujarat. Adapted from a recipe published in Saveur magazine, December 2009. Black and brown mustard seeds are used in Asian cuisine and impart a different flavor than yellow mustard seeds.
Toss cabbage and salt in a bowl. Let wilt for 1 hour. Squeeze excess liquid from cabbage; set aside.
Heat oil in a 12" skillet over medium-high heat. Add mustard seeds, cumin seeds, and bay leaves; cook, stirring, until fragrant, about 2 minutes. Add reserved cabbage, garlic powder, turmeric, tomatoes, and peppers. Cook, stirring until cabbage is crisp tender, 6-7 minutes. Stir in cilantro, lime juice, and sugar. Season with salt; cook until flavors meld, 3-5 minutes.