In a large, deep pot over medium high heat, add half the olive oil (1.5 tablespoons) to heat. Add the onions, celery, carrot and minced garlic. Stir together and allow to sweat for about 8 minutes, to soften and release natural juices from the veggies. Add in the tomatoes, brown lentils, garam masala and salt and pepper. Stir together. Pour in the vegetable broth, and add the thyme and stir again. Bring to a boil, and then to a simmer for 30 minutes, until lentils are fully cooked. Add in kale and lime juice and stir to combine. Remove the thyme. Scoop out two cups of soup (with liquid) and pour into your blender. If you have a glass blender, ensure it cools down a bit first! Press the soup setting or blend until fully blended out. Pour back into soup pot and mix the soup together one more time to combine everything. Serve the soup and top with your favourite toppings and enjoy!