In a large pot, heat the olive oil over medium heat. Add the diced onion and sauté for about 5 minutes, or until translucent.
Stir in the minced garlic, diced carrots, celery, and red bell pepper. Cook for another 5-7 minutes until the vegetables start to soften.
Add the rinsed lentils to the pot and stir to combine with the vegetables.
Pour in the diced tomatoes and vegetable broth. Add in the cumin, smoked paprika, oregano, salt, and pepper. Bring the mixture to a boil.
Once boiling, reduce the heat to low, cover the pot, and let simmer for 25-30 minutes, or until the lentils are tender. Stir occasionally to prevent sticking.
Once the lentils are cooked, remove from heat and stir in the fresh lemon juice to brighten the flavors.
Adjust seasoning with extra salt and pepper if needed.
Serve hot, garnished with a sprinkle of fresh parsley on top.
Notes
Adjust seasoning to taste and serve hot with fresh parsley on top.