Step 1

Preheat toaster oven (or oven) to 350°F. Slice tortillas into ¼-inch-wide strips and place on toaster-oven tray (or baking sheet); drizzle with oil and toss to coat. Bake until lightly crisped and just starting to brown on the edges, about 5 minutes. Set aside to cool.

Step 2

Meanwhile, combine broth, tomatoes with chiles, black beans, and corn in a large heavy saucepan. Bring to a boil over medium-high heat. Stir in kale (or spinach) and chicken; cook, stirring, until the greens are tender, 3 to 5 minutes.

Step 3

Divide among 4 soup bowls and top each with tortilla strips. Serve with lime wedges, if desired.