Preheat your oven to 375°F (190°C) and prepare a loaf pan by greasing and lining it with parchment paper.

Sauté chopped onion and bell pepper in a skillet over medium heat for about 5-7 minutes until tender.

In a food processor, combine drained chickpeas, sautéed vegetables, garlic powder, onion powder, and desired spices. Pulse until roughly chopped.

Transfer the chickpea mixture to a bowl. Add breadcrumbs and flaxseed meal, season with salt, and mix well.

Press the mixture firmly into the prepared loaf pan and smooth the top.

Bake in the preheated oven for 30 minutes, then spread tomato sauce over the top and bake for an additional 20-25 minutes.

Allow the meatloaf to cool in the pan for 10 minutes before lifting it out and slicing for serving.