Sirloin Black Bean Chili

Name: Sirloin Black Bean Chili
Cuisine: American, Mexican, Latin American
Ingredients: 1 Tbsp extra-virgin olive oil; 1 Tbsp minced garlic; 1 Tbsp chili powder; 2 tsp ground cumin; 6 oz boneless sirloin of beef, cut into 1/2-in cubes; 1 cup diced tomatoes; 1 cup chopped red onion; 1 qt vegetable stock; 2 1/2 cups cooked black beans; 1/4 cup chopped fresh cilantro; 1 tsp sea salt; 1/4 tsp freshly ground black pepper; 6 Tbsp chopped scallions