Step 1

Heat olive oil in a large saucepan over medium-high heat. Add the onion and garlic and cook, stirring, for 3 minutes or until the onion softens. Add the potato and leek and cook, stirring, for 5 minutes or until leek softens.

Step 2

Add the stock and bring to the boil. Reduce heat to medium and gently boil, uncovered, for 20 minutes or until potato is soft. Remove from heat and set aside for 10 minutes to cool.

Step 3

Meanwhile, preheat oven to 200C or 180C fan-forced. Place bread in a roasting pan. Drizzle with remaining oil and toss until bread is evenly coated. Toast in preheated oven, shaking pan occasionally, for 10-15 minutes or until crisp. Remove croutons from oven and set aside.

Step 4

Transfer one-third of the potato mixture to the jug of a blender and blend until smooth. Transfer to a clean saucepan. Repeat in 2 more batches with the remaining potato mixture. Alternatively, use a stick blender to blend in the saucepan.