Chilled Tortilla Soup

Ingredients

• teaspoon ground cumin
• teaspoon chili powder
• About 1 teaspoon salt
• corn tortillas
• tablespoons olive oil
• yellow onions , peeled and chopped
• garlic, peeled and minced
• quarts fat-skimmed chicken broth
• lime juice
• tablespoon chipotle chile purée
• chopped seeded ripe tomatoes
• minced red onion
• chopped fresh cilantro
• limes, cut into thin wedges
• crumbled queso fresco or shredded jack cheese