When the carrots are ready remove from the oven and set aside
Place a large pot with 1 tablespoon of olive oil on medium heat. Add the finely chopped onion and soften a little for a couple of minutes (do not brown)
Add the roasted carrots to the pot and mix through. Add the stock, ensuring that the carrots are well covered. As I use powdered/granulated stock, I like to sprinkle the powder over the carrots and mix through before adding the water as I find it adds more flavour to the veg. But feel free to mix it before adding to the pot or using liquid veggie stock
Cook for around 15 minutes on medium heat. You want a steady simmer not a rolling boil
If using tinned/canned lentils, drain and set aside
After the soup has cooked for the fifteen minutes, remove from the heat and blend, either using a hand/stick (immersion) blender or a standard blender. If using a standard blender, remember to remove the middle section from the lid to prevent the steam building up and causing an 'explosion'. Blend until you achieve your desired smoothness
Return to the pot and set on the stove again. I do not usually turn the heat on as the residual heat is usually enough to keep the soup warm. If not, or if you have prepped the soup early, heat through on a low temperature
Add ⅔ of the lentils to the soup and mix through. Set the remaining lentils aside if you wish for decorating later. (If you want a smooth soup you can add all or just the ⅔ lentils to the soup before blending. This could be useful if the kiddos don't like lentils. Note though that blending the lentils will change the colour of the soup a bit)
Add the cream and stir through until combined. Taste the soup at this point to check if it needs extra seasoning. Be sure not to bring the soup to a boil after adding the cream as it will curdle/split
Serve warm with the lentils you set aside earlier. I like to add a sprinkling of freshly chopped parsley or coriander, and on occassion some toasted shredded coconut