I don't follow a recipe as such!
I use cooked, grated, defrosted frozen or tinned fruit, mashed. I've used apples, pears, bananas, peaches, plums, apricots, prunes, rhubarb, gooseberries, grapes, all work fine. A mixture of a couple is also nice.
I put the mashed fruit into a bowl, add a big spoonful or 2 of peanut or almond butter, and then keep spooning in oats and mixing until it looks the right sort of consistency - like a flapjack.
I stir in mixed spice/cinnamon/nutmeg/ginger/allspice, a couple of teaspoons usually.
I then usually (but not always) add some chopped pecans/walnuts/almonds/hazelnuts, and/or raisins/currants/sultanas/chopped dried figs/apricots etc. Some frozen blueberries also works well at this point, if you put them in frozen they end up as whole berries in the finished bar, rather than just disintegrating into the mixture.
Then taste. It's usually sweet enough as it is but if not (for example if I've used rhubarb or gooseberries as the base) I add a spoonful or 2 of honey.
I press it down into a lined baking tin, and then bake at 180 fan for about 25-30 minutes. Cool, slice and enjoy! They freeze well so I usually wrap up a few in clingfilm for the freezer.
Sorry to be so vague, it's one of those recipes that always works no matter what. It still works if the mixture is a bit wetter or drier, just makes more or less squishy bars.