Heat the 1 tablespoon (15 ml / 0.5 fl oz) of oil in a large pot over medium heat.
Add the garlic and cook until fragrant, about 30 seconds.
Stir in 1 cup (240 ml) of the salsa and the vegetable broth.
Bring to a simmer and cook for 5 minutes.
Remove from the heat and allow the mixture to cool slightly.
Halve and pit one of the avocados and place the flesh in a blender or food processor.
Add the slightly cooled soup mixture and process until completely smooth.
Transfer the soup back to the pot.
Stir in the lime juice and parsley, and season to taste with salt and pepper.
Simmer over low heat to keep warm while you prepare the tortillas.
Lightly brush the corn tortillas with oil and cut them into thin strips, about ¼ inch wide by 2 inches long.
Heat a skillet over medium heat.
Add the tortilla strips in a single layer and cook, turning occasionally, until golden brown and crisp on both sides, about 3 minutes.
Just before serving, halve, pit, and dice the remaining avocado.
Stir half of this diced avocado directly into the soup.
To serve, ladle the soup into bowls and garnish with the remaining diced avocado, the reserved ½ cup of salsa, and the crispy tortilla strips.