Heat oil in a large skillet or pot over medium heat
Add fideo noodles and toast until golden brown
Add chopped onion and garlic
Cook until softened
Stir in tomato sauce or blended tomatoes
Add broth or water
Season with salt and pepper
Bring to a boil
Reduce heat and simmer until noodles are tender
Stir occasionally to prevent sticking
Add cooked meat or vegetables if desired
Serve hot