Spiced Veggie, Lentil & Chickpea Soup (Harira) with Pistachios

Name: Spiced Veggie, Lentil & Chickpea Soup (Harira) with Pistachios
Cook time: 35 min
Total time: 35 min
Yield: 2 servings
Ingredients: ½ cup brown lentils, dried; 1 medium carrot; 1 stick celery; 32 fl oz chicken or vegetable broth; ½ small bunch cilantro; 1 (14.5 oz) can diced tomatoes; 1 (15 oz) can garbanzo beans (chickpeas); 1 clove garlic; ½ lemon; ¼ cup pistachios, unsalted; ½ medium yellow onion; 4 tsp all-purpose flour; ¼ tsp black pepper; ¼ tsp brown sugar; 1 tsp chili powder; ¼ tsp crushed red pepper; 1 tsp cumin, ground; 2 tsp extra virgin olive oil; ½ tsp salt; ½ tsp turmeric, ground