01 - Preheat the oven to 400°F. Line a baking sheet with parchment paper for easy cleanup and to prevent sticking.
02 - Toss the sweet potato cubes with 1 tablespoon olive oil, salt, and pepper until evenly coated. Spread in a single layer on the prepared baking sheet. Roast for 25 minutes, flipping halfway through, until golden brown and tender when pierced with a fork.
03 - Combine the rinsed lentils and 3 cups water in a saucepan. Bring to a boil over high heat, then reduce heat to medium-low and simmer uncovered for 20–25 minutes until lentils are tender but still hold their shape. Drain any excess liquid and season lightly with salt.
04 - In a small bowl, whisk together tahini, lemon juice, olive oil, maple syrup or honey, minced garlic, salt, and pepper. Gradually add 2–3 tablespoons water, whisking continuously, until the dressing reaches a creamy, pourable consistency.
05 - Divide the spinach or mixed greens evenly among four bowls. Arrange the roasted sweet potatoes, cooked lentils, cherry tomatoes, and cucumber on top of the greens in sections.
06 - Drizzle each bowl generously with the tahini dressing. Top with toasted pumpkin seeds and fresh parsley if using. Serve immediately while the sweet potatoes are still warm.