Simple, quick and keeps in the fridge.

• 1 ripe avocado – the bigger, the better.
• Juice of half a lemon.
• Tomato(es).
• 2 slices bread.
• Butter/spread.
• Seasoning.

Mash the avocado flesh with the lemon juice. Moderately toast the bread (untoasted ordinary sliced bread is too floppy to hold the topping). Top with sliced tomatoes. Pinch of seasoning. Makes two-to-four servings depending on the size of the avocado – there were only small ones the day I went shopping, meaning the price per serving was above £1, but a good sized avocado will make twice as much, dropping the price closer to 80p.