Basic rule is six parts dry to one part wet and seasoning - something like:
Dry - 3 parts rolled oats, 1 part nuts, 1 part seeds, 1 part other (coconut, puffed/flaked grains, more nuts or seeds). Add dried fruits after cooling
Wet - Best 50/50 fat (coconut oil or neutral flavoured oil) and sweetener (mix of honey, golden, maple or sugar syrup). Use less sweetener if adding dried fruit later
Seasoning - always a little salt. Maybe cinnamon, cardamon or whatever to taste.
Method
Mix the dry ingredients, stir in the wet ingredients and seasoning - taste and adjust. Line a baking sheet with parchment, spread the granola out and bake at 150C for 40 mins - check and stir a couple of times.
Add dried fruit to hot granola on removal from oven. Allow to cool and store in jar.
[For a one litre Kilner jar - 4/5th fill jar with dry ingredients (some rice crispies are good) and mix with c. 80gms oil and 100 gms. syrup or honey (less sweetener if adding dried fruit) - not forgetting salt, cinnamon or similar]