Preheat your oven to 350°F (175°C) and prepare a 9x5-inch loaf pan by greasing it lightly.

In a large mixing bowl, whisk together flour, baking powder, salt, and sugar. Set aside.

In another bowl, whisk together eggs, vegetable oil, vanilla extract, and crushed pineapple with juice.

Pour the wet ingredients into the dry ingredients. Stir until just combined and fold in optional ingredients if desired.

Pour the batter into the prepared loaf pan and bake for 55-65 minutes, covering with aluminum foil if the top browns too quickly.

After baking, cool the loaf in the pan for about 10 minutes before transferring to a wire rack to cool completely.