For a 7-inch (18 cm) cake:

100g rolled oats (1 cup)
200ml milk (¾ cup + 2 tablespoons)
2 large eggs
1 teaspoon vanilla extract
¼ teaspoon salt
2 medium ripe bananas (approximately 200g)
1 medium apple (approximately 150g)
100g fresh cranberries (1 cup)
30g chopped walnuts (¼ cup)
Step-by-Step Instructions
Preheat your oven to 180°C (360°F). Line a 7-inch (18 cm) round cake pan with parchment paper.
In a large bowl, combine the rolled oats and milk. Let it sit for 10 minutes to allow the oats to soften.

Meanwhile, peel and mash the bananas until smooth. Core and dice the apple into small cubes.