Sour creamblack olives, green onions, tomatoes, etc for topping.
In a large skillet (10 inches or larger), brown ground beef with onion, salt, and 1 tsp cumin. Remove meat from pan and drain on paper towels-- set aside.
In the same skillet, heat vegetable oil over medium heat and stir in the chili powder, corn starch, and remaining teaspoon of cumin. Give it a stir and let cook for about 1 minute- once it becomes aromatic, you're good.
Stir the chicken broth and tomato sauce, mixing until it’s well combined and smooth. Keep stirring until it comes up to a boil, is starting to thicken and let boil for 1 minute.
Add meat and cut tortillas to the sauce, stirring until all the tortillas are moistened by the sauce. Bring to a simmer, cover and let cook over med-low heat for about 15 minutes or until the tortillas are soft and have absorbed some sauce. Remove pan from heat.
Top with grated cheese, cover to let the cheese melt and garnish as desired.