Cut the tortillas into strips and fry them in a pan with hot oil. Be careful not to brown too much. Remove excess oil with absorbent paper and reserve.
In a saucepan, heat a little olive oil and sauté the onion, the garlic cloves and the jalapeño for a few minutes, all finely chopped.
Add the chopped tomatoes and cook about 10 minutes, until soft.
Add the chicken broth and season to taste. Let cook over medium heat for 15 minutes.
Serve the soup hot and garnish with the fried tortilla strips, diced avocado, cut queso fresco, chopped fresh cilantro and a few wedges of lime.