Mix eggs and buttermilk in mixer bowl and beat until combined.
Add zucchini, cheese and scallions and just mix through.
Bake 1- 1 1/4 hours until tester inserted in middle comes out clean.
Cool thoroughly on wire rack.
General Baking Tips:Always measure dry ingredients with a dry measuring cup. Measure with dry measuring cups or weigh dry ingredients.Always measure liquid ingredients with liquid measuring cupNever break eggs directly into recipe ingredients. Break eggs into a separate bowl, in case you get any shells, so that you can pull them out.Make sure that you know what temperature your oven is set at. Buy an oven thermometer and check oven temperature regularly.Always check baked goods, like cakes or quick breads with cake tester, placed in center. If the tester comes out clean, it’s done.