Carne Asada Tacos

Ingredients

• 1-1/2 to 2 lbs carne asada or thinly sliced top round steak
• 2 cups chicken stock
• 1 14.5 ounce can finely diced tomatoes with juices
• 1 tsp tomato paste
• 1 red onion, chopped fine
• 3 cloves garlic, minced
• 1 tbsp light red chili powder
• 1 tsp ground cumin
• 1/2 tsp adobo seasoning
• Salt and pepper to taste
• 2 tbsp olive oil
• Flour or corn tortillas, heated
• Sour cream and lettuce as toppings (completely optional)