Spiced Lentil Tacos

INGREDIENTS

• 1 package (2.25 ounce) taco seasoning
• 2 teaspoons adobo sauce
• 1/2 teaspoon salt
• 1 cup dried brown lentils, rinsed
• 1 clove garlic, chopped
• 1 cup finely chopped onion
• 1 1/4 cups shredded lettuce
• 2 1/2 cups vegetable broth
• 1 cup chopped tomato
• 1 tablespoon olive oil
• 1/2 cup fat-free sour cream
• 8 taco shells
• 1/2 cup shredded reduced-fat (2 percent) cheddar
• 1 chipotle chile in adobo sauce, finely chopped (use half for less heat)