Preheat and prep: Heat your oven to 425°F (220°C). Line a large sheet pan with parchment for easy cleanup.
Cut your veggies evenly: Aim for similar sizes so everything cooks at the same pace. Firmer vegetables like sweet potatoes should be about 1-inch pieces; softer veggies can be a bit bigger.
Season on the pan: Add all the veggies to the sheet pan.
Drizzle with olive oil, sprinkle with salt, pepper, and spices if using. Toss right on the pan until everything is coated and spread in a single layer.
Roast until caramelized: Bake for 25–35 minutes, tossing halfway. You’re looking for browned edges and tender centers.
If the pan is crowded, use two pans to prevent steaming.
Make the tahini drizzle: In a bowl, whisk tahini, garlic, lemon juice, and maple syrup. Slowly whisk in warm water until it’s pourable and silky. Add a pinch of salt and adjust lemon or sweetness to taste.
Taste and adjust: When the veggies are done, taste for seasoning.
Add a pinch more salt or a squeeze of lemon if needed.
Finish and serve: Transfer veggies to a platter or keep on the pan. Drizzle generously with the tahini sauce. Top with herbs and seeds.
Serve as-is or over grains, and add chickpeas or feta if you like.