... well worth dicking about with ingredients & flavours!
60g rolled oats
40g oat 'flour' or medium oatmeal
1/4 teaspoon salt
40g butter
60g mixed nuts / seeds / granola
30g sugar
1-2 teaspoon cinnamon / nutmeg / ginger
for savoury crumble:
substitute 1-2 teaspoon chopped herb / pepper / thyme / sage
& reduce sugar a tad if you want