This was really good, a great change up from the usual roast and potatoes!
Mash the garlic, oregano, salt and pepper into a paste on a cutting board with the flat side of a knife; place the garlic mix in a bowl and stir in the oil and vinegar.
No need for a mixer for this recipe. Preheat the oven to 350°. With a wooden spoon, mix butter into the mashed bananas in a large mixing bowl. Mix in the sugar, egg, and vanilla. Sprinkle the baking soda and salt over the mixture and mix in. Add the flour last, mix. Pour mixture into a buttered 4x8 inch loaf pan. Bake for 45min. Cool on a rack. Remove from pan and slice to serve.