1.Blend or process white onion, garlic, chilli and tomato until smooth.
2.Heat oil in a large saucepan; cook tomato mixture and allspice, stirring, until fragrant.
3.Add stock, the water, rind, juice and paste; bring to the boil. Reduce heat; simmer, uncovered, for 15 minutes or until soup thickens. Season to taste.
4.Meanwhile, heat extra oil in a medium frying pan; cook tortilla strips, in batches, until golden. Drain on absorbent paper.
5.Divide tortilla strips into bowls; ladle over soup. Serve topped with combined avocado, green onion and coriander.
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