Put the strawberries, lemon juice, syrup and vanilla in a small pan and cook over low heat until you get a sticky, compote-like mixture (it should not become jam-like).
Preheat the oven to 180°C.
Line two small bread tins with paper basket or prepare a medium-large silicon loaf tin.
Mash the bananas, then add the oil, vanilla essence and milk.
Mix in the flour, baking powder and oats, then add the banana mixture and combine.
Fold in the chopped walnuts and stewed strawberries.
Transfer the mixture into the prepared tins and bake for about 35 minutes until golden.
Let them cool completely, then cut them into slices.