Another one from Nigella Feasts. I always use less sugar than her recipes though.

1 1/2 cups all-purpose flour (I used Healtheries gluten free baking mix)
1 teaspoon baking soda
1/4 teaspoon salt
1 cup buttermilk
1 large egg
1/2 cup Golden Baker's natural cane sugar or other light brown sugar
1/3 cup vegetable oil
2 cups granola (I used my raw granola with strawberries and apple)

Heat oven to 200 C. Line a 12-cup muffin pan with paper liners. In a large bowl combine the flour, baking soda and salt. In a small bowl whisk together the buttermilk, egg, sugar and oil. Pour liquid mixture into dry mixture and stir just until combined; do not overmix. Add granola and stir just until blended.
Divide batter evenly among muffin cups. Bake until risen and golden brown, about 20 minutes. Carefully remove muffins from pan and place on a rack until cool enough to handle. Serve warm. Makes 12.