Place lentils in a small bowl. Cover with cold water and soak 10 minutes. Drain.
Cook lentils in boiling salted water until tender, but firm, about 30 minutes. Drain lentils. rinse under cold water, then drain gain.
Preheat oven to 375 egrees. Place squash in large bowl; toss with 2 tablespoons oil, cumin, paprika and sea salt. Arrange squash in a single layer n baking sheet; roast 20 minutes. Turn squash over and roast 10 to 15 minutes longer. Cool.
Combine lentils, pumpkin and oil from baking sheet with arugula, half the goat cheese, mint, vinegar and 1 tablespoon oil. Season with salt and pepper. Divide among plates; sprinkle remaining goat cheese over.