This Sopa de Fideo comes together quickly with just a handful of pantry staples. The key step is toasting the noodles before adding liquid, which gives the soup its signature flavor and texture.
In a large sauce pan over medium heat, heat olive oil until shimmering. Add fideo pasta and sauté, stirring often, until golden brown, about 3 to 5 minutes (watch the noodles so they don't get burned).
Stir in onions and garlic and continue to cook until tender, about 2 to 3 minutes longer. Stir in tomato sauce and El Pato sauce. Cook, stirring often, until tomato sauce deepens in color, about 2 to 3 minutes.
Stir in chicken broth, 1/2 teaspoon salt, and 1/4 teaspoon pepper. Bring to a boil. Reduce heat and simmer until noodles are al dente, about 7 to 8 minutes. Season to taste (I don't add anymore salt or pepper at this point), and serve with queso fresco, cilantro, and avocado, or your favorite toppings.
Notes
Fideo pasta: This slender, short pasta is traditionally used in this soup. If unavailable, break vermicelli or angel hair pasta into 1-inch pieces. Toast carefully, as it can scorch easily.
El Pato hot tomato sauce: A Mexican-style tomato sauce crafted with chiles and spices that provides heat and richness. For a milder soup, replace it with an extra can of tomato sauce.