Ingredients

8 ounces dried kidney beans (scant 1 1/2 cups)

2 1/2 cups homemade or low-sodium store-bought chicken stock

1/2 teaspoon dried oregano

1/2 teaspoon ground cumin

1 bay leaf

1 whole cinnamon stick

1/2 teaspoon coarse salt

2 teaspoons extra-virgin olive oil

1 medium onion, halved and very thinly sliced

1/3 cup plain nonfat yogurt, preferably Greek-style

4 cups baked blue corn chips (10 ounces)

Preparation

Cover beans with at least 2 inches of water in a large bowl. Cover loosely, and let soak overnight at room temperature.

Drain beans; transfer to a medium saucepan. Add stock, herbs, spices, and salt. Bring to a boil, then reduce heat to medium-low. Simmer beans until tender, 15 to 20 minutes. Drain beans; reserve cooking liquid. Discard bay leaf and cinnamon stick. Let liquid cool completely.

Heat oil in a medium skillet over medium-high heat. Add onion; reduce heat to medium. Cook, stirring occasionally, until caramelized, about 25 minutes.

Pulse beans and 1/2 cup cooking liquid in a food processor until smooth. Add more cooking liquid if needed to reach desired consistency. Transfer to a serving bowl. Top with yogurt, then onions. Serve with chips. Dip can be refrigerated in an airtight container up to 3 days.