1. Combine the lentils and water in a pot over high heat and bring to a boil. Reduce heat and simmer while preparing other ingredients.
2. Saute the onions in half of the olive oil in a saucepan over medium heat for about 4 minutes.
3. Add the bell pepper and saute for a minute or two longer.
4. Add the onion mixture to the lentils. Simmer 15 minutes.
5. Season with salt, pepper, and cumin. Simmer for 15-20 minutes longer.
6. Stir in the cilantro; remove dish from heat.
7. Combine the garlic, lime juice and the remaining 1/2 tablespoon olive oil in a food processor or blender and blend well.
8. Add garlic mixture and lime juice to the lentil mixture. Mix well and serve.