Avocado cold soup: On olive oil, turn translucent the chopped spring onion, pour in the broth, bring to a boil, reduce heat, add fish sauce and cook covered for 10 minutes. Cool.
Place peeled avocados in a blender cup, pour lime juice and cooled broth. Blend into perfectly smooth cream, at the end add cream. Chill in the refrigerator for at least 1 hour.
Tomato salsa: Scald tomato, peel, cut into quarters, remove seeds, cut the flesh into small cubes, mix with olive oil, grated garlic, chopped onion, lime juice and chopped chili. Add about 1/3 cup of cilantro leaves, mix. Season with salt and pepper just before serving.
Pour cold soup into bowls, place tomato salsa on top, can be drizzled with avocado oil.