I do the weighing by hand/eye/taste so you can add more or less of your favourite ingredients.
To make a big jar you will need,
2 large handfuls of oats
1 large handful of walnuts, pecans, hazelnuts (mixed or just choose one)
Small handfuls of almonds
Pulse the above ingredients for 30 seconds on a food processor, you don’t want them too fine.
Then on a large bowl mix them with,
1 large handful of pumpkin seeds
1 large handful if sunflower seeds
Small handful flaxseeds
And melted coconut oil and maple syrup to taste and the mixture is sticky.
Bake on a lined oven tray for about 40 minutes stirring occasionally to toast it evenly.
Once cool mix in,
1 Handful raisins, sultanas, goji berries, cocoa nibs, coconut flakes or any other bits you make like.