Preheat oven to 325°F Spray a standard bread pan with cooking spray. I use an aluminum bread pan. Mash bananas and lemon juice in a bowl. In a seperate mixing bowl beat eggs, sugar, and vanilla until well combined. Add oil and mix for about 10 strokes. Add bisquick and mix vigorously. Mixture will be very thick and some lumps will remain. Add banana mixture and mix vigorously again. Some lumps will remain. Pour batter into greased bread pan. Bake for 1 hour and test. Continue in ten minute intervals until a tooth pick inserted comes out clean. Whether you use a glass or metal bread pan will impact the cooking time.