Follow these steps to create your delicious Vegetable Lentil Soup:

1. Heat the Oil: In a large pot or Dutch oven, heat the olive oil over medium heat.
2. Sauté Vegetables: Add the chopped onion, garlic, carrots, and celery. Sauté for about 5-7 minutes until softened.
3. Add Peppers and Zucchini: Stir in the bell pepper and zucchini. Cook for an additional 3 minutes.
4. Incorporate Lentils: Add the rinsed lentils to the pot and stir to combine with the vegetables.
5. Add Tomatoes and Broth: Pour in the diced tomatoes and vegetable broth. Stir well.
6. Season the Soup: Add the ground cumin, smoked paprika, bay leaf, salt, and pepper. Mix until well combined.
7. Bring to a Boil: Increase the heat and bring the mixture to a boil.
8. Simmer: Once boiling, reduce the heat to low and let the soup simmer for 25-30 minutes, or until the lentils are tender.
9. Adjust Seasoning: Taste the soup and adjust the seasonings as needed. Remove the bay leaf before serving.
10. Serve: Ladle the soup into bowls and garnish with fresh parsley or cilantro. Serve with lemon wedges for a bright touch.