Preheat Oven and Prep Pan:
Heat oven to 350°F (175°C). Coat an 8x4 or 9x5-inch loaf pan with olive oil or line with parchment.Whisk Dry Ingredients:
In a large bowl, combine ground flaxseed meal, whole flaxseeds, sunflower seeds, pumpkin seeds, chia seeds, baking powder, and salt by whisking.Whisk Wet Ingredients:
In a separate bowl, whisk eggs with olive oil and water until uniform and lightly aerated.Fold Wet into Dry:
Add the wet mixture to the dry ingredients. Gently fold with a spatula until barely mixed; avoid overworking.Bake and Cool Loaf:
Transfer batter to the prepared pan, level the top. Bake for 45-50 minutes until golden and a toothpick inserted yields mostly clean with a few moist crumbs. Let cool in pan for 15 minutes, then turn out onto a wire rack.