Cut the corn tortillas into thin strips.
Heat vegetable oil in a large pot over medium heat.
Add tortilla strips and fry until golden and crispy. Remove and drain on paper towels.
In the same pot, sauté onions until translucent.
Add minced garlic and chopped jalapeño, cooking for another minute.
Pour in the chicken or vegetable broth, and bring to a boil.
Stir in the diced tomatoes and cumin, seasoning with salt and pepper.
Simmer for about 15 minutes, allowing flavors to meld.
Ladle soup into bowls and top with crispy tortilla strips.
Garnish with fresh avocado slices, queso fresco, and cilantro.