1 pound ground sirloin
1 1/4 cups chopped onion
6 garlic cloves, minced
1/2 teaspoon ground cumin
1/2 teaspoon ground red pepper
1/8 teaspoon kosher salt
1 tablespoon no-salt-added tomato paste
1 cup fat-free, lower-sodium beef broth
1/3 cup water
1 (10-ounce) can diced tomatoes and green chiles, undrained
4 ounces lightly salted corn chips (such as Fritos)
1/3 cup (1 1/2 ounces) shredded sharp cheddar cheese
1/4 cup fat-free sour cream
1/2 cup diagonally sliced green onion tops