Cut paneer into ½” cubes. Thinly slice the green and white parts of the scallions. Clean the cauliflower and cut into small florets. Preheat the oven to 425ºF.
Rinse the lentils. Add to a medium saucepan and add enough water to cover by about 1 inch. Bring to heavy boil over medium-high heat, turn the heat to low and simmer for 20 minutes (or more) until tender but not overcooked. They should be just past al-dente. Check frequently after the 20-minute mark. When done, drain and set on a clean kitchen towel to absorb any remaining liquid.
Mix the cauliflower and the cubed paneer with 1 tbsp olive oil and salt. Add to a sheet pan and roast for 20-25 minutes, stirring every 7-10 minutes if you can, until the florets and paneer are crispy on the outside and tender.
While that roasts, make the dressing. Roughly chop cilantro leaves and tender stems until you have 1 cup (tightly packed). Add with the olive oil to a small food processor cup (or stick blender cup). Trim the pepper and add to the cup. Also add the juice of the lime (about ¼ cup), the 1 tsp crushed coriander seeds, and ½ tsp peppercorns and ½ tsp salt.
When the paneer and cauliflower is done, add to a very large bowl. Stir in the drained lentils and scallions. Drizzle with just a little of the dressing (maybe ¼ cup). Then serve and drizzle extra dressing as you serve. Store the dressing and mixture separately, to keep it fresh. Shake/mix the dressing before serving.