Combine flour, baking soda and salt in a medium-sized bowl.
Put sugar, butter and olive oil into a large bowl and beat with an electric mixture until well blended. Add eggs one at a time beating well after each addition. Add mashed bananas and yogurt then beat until well blended. Add flour mixture and beat at low speed just until blended.
Pour batter into a 9 x 4 x 4-inch loaf pan, which has been generously greased (oil or non-stick cooking spray can be used) and floured to prevent sticking.
Bake at 350°F for 60 to 65 minutes or until toothpick inserted into the center comes out clean. Let stand in pan about 5 minutes. Remove from pan and cool completely on wire cooling rack.
Servings: 1 loaf – about 12 slices