Rustic Tortilla Soup with Pork

Ingredients

• 2 tbsp vegetable oil
• 1/2 cup onion , chopped
• 2 tsp garlic , chopped
• 1 1/2 tsp chili powder
• 1/2 tsp cumin
• 1 398-mL can diced tomatoes
• 1 L low-sodium chicken broth
• 1/2 tsp chipotle chilies in adobo sauce , finely chopped
• 1 1/2 cups pork roast , shredded
• 2 cups tortilla chips , crumbled
• 1/4 cup queso fresco , crumbled
• 1 small avocado , diced