01 - Preheat the oven to 425°F. Line a baking sheet with parchment paper.
02 - Toss the cubed butternut squash and sliced red onion with olive oil, smoked paprika, ground cumin, salt, and black pepper. Spread the mixture evenly on the baking sheet.
03 - Roast the squash and onion for 25 to 30 minutes, stirring once halfway through, until tender and caramelized.
04 - While roasting, rinse millet under cold water. Bring 2 cups water and ¼ teaspoon salt to a boil in a saucepan. Add millet, reduce heat to low, cover, and simmer for 15 to 18 minutes until water is absorbed. Remove from heat and let stand covered for 5 minutes, then fluff with a fork.
05 - Whisk together olive oil, lemon juice, tahini, maple syrup or honey, smoked paprika, garlic powder, salt, and pepper until smooth.
06 - Divide millet between four bowls. Top with roasted squash and onion, fresh baby spinach, pumpkin seeds, crumbled feta if using, and chopped herbs.
07 - Drizzle smoky dressing over each bowl just before serving.