In a bowl combine together the shrimp, 2 tablespoons olive oil, sumac and the minced garlic. Heat a large skillet and cook the shrimp on medium heat for about 2 minutes on each side. Remove the shrimp from the heat and dust with more sumac. Set aside until ready to serve.
Harissa Beans soup
In a large pot heat the remaining olive oil on medium heat. Cook the white onion until translucent.
To the pot add the tomatoes and the harissa paste. Let them cook for about 3 minutes until the tomatoes start to slowly break.
Add the beans together with the bean broth or vegetable broth. Cook for about 10 minutes so that the beans become tender. Season with salt to taste.
Lastly, add the spinach and let it slightly wilt. Remove from heat.
Serve the bean soup immediately warm and top it off with the shrimp. Serve alongside some fresh toasted crusty bread.