America's Test Kitchen Beef Tacos

INGREDIENTS

• 1 tablespoon vegetable oil
• 1 onion, minced
• 3 garlic cloves, minced
• 2 tablespoons chili powder
• 1 teaspoon cumin
• 1 teaspoon coriander
• 1/2 teaspoon oregano
• 1/4 teaspoon cayenne pepper
• salt
• 1 lb lean ground beef
• 1/2 cup canned tomato sauce (I use Hunt's)
• 1/2 cup low sodium chicken broth
• 2 teaspoons cider vinegar
• 1 teaspoon light brown sugar
• 8 taco shells