1 Preheat Oven To 350F. Prepare Two 4X9-Inch Loaf Pans, Either Coating With Butter Or Spraying With Baking Spray. 2 In A Large Bowl, Whisk Together The Flour, Baking Soda, Baking Powder, Salt, And Rosemary. 3 Beat The Eggs In A Mixer (Or By Hand) Until Frothy. Beat In The Sugar. Beat In The Melted Butter And Olive Oil. Stir In The Lemon Zest And Grated Zucchini. 4 Add The Dry Ingredients To The Wet, A Third At A Time, Stirring After Each Incorporation. 5 Divide Batter/Dough Into Two Loaf Pans. Bake In A 350