01 - Preheat the oven to 425°F. In a large mixing bowl, toss diced sweet potato, bell pepper, zucchini, and red onion with olive oil, ground cumin, smoked paprika, salt, and pepper. Evenly spread vegetables on a baking sheet and roast for 20 to 25 minutes, stirring halfway, until tender and golden brown.
02 - Combine rinsed quinoa, water or vegetable broth, and a pinch of salt in a saucepan. Bring to a boil over medium-high heat, then reduce to low, cover, and simmer for 15 minutes. Remove from heat and let it sit covered for 5 minutes before fluffing with a fork.
03 - In a small bowl, whisk together tahini, lemon juice, maple syrup, minced garlic, and salt. Add water 1 tablespoon at a time until the dressing reaches a smooth, pourable consistency.
04 - Divide cooked quinoa among serving bowls. Top each with roasted vegetables, sliced avocado, preferred fresh herbs, and seeds. Drizzle generously with lemon-tahini dressing. Add lemon wedges for serving if desired.
05 - For meal preparation, store quinoa, roasted vegetables, and dressing in separate airtight containers in the refrigerator. Assemble just before serving.