Preheat your oven to 425°F (220°C) and line a baking sheet with parchment paper for easy cleanup.
Prepare the pumpkin by tossing cubes with 2 tablespoons olive oil, cumin, smoked paprika, salt, and pepper in a large bowl until evenly coated.
Spread the seasoned pumpkin in a single layer on the prepared baking sheet, ensuring pieces aren’t overcrowded (use two sheets if necessary).
Roast the pumpkin for 25-30 minutes, turning halfway through, until tender and edges are caramelized with a beautiful golden-brown color.
While the pumpkin roasts, cook the lentils by bringing them to a boil in the vegetable broth, then reducing heat and simmering for about 20-25 minutes until tender but not mushy.
Drain any excess liquid from the lentils and transfer them to a large bowl to cool slightly.
Prepare the dressing by whisking together the remaining tablespoon of olive oil, lemon juice, balsamic vinegar, minced garlic, salt, and pepper in a small bowl.
Combine the slightly cooled lentils with the roasted pumpkin, red onion, chopped herbs, and dressing, gently tossing to coat everything evenly.
Transfer to a serving platter and top with crumbled feta and toasted pumpkin seeds just before serving.