Preheat oven to 400 degrees F.
Use a sharp knife to slice the sweet potatoes in half lengthwise. Rub the cut sides with a small amount of olive oil and season with salt and pepper. For easy cleanup, it's optional to line a baking sheet with parchment paper or aluminum foil. Place the sweet potatoes cut side-down on a baking sheet and place on the middle shelf for 25-30 minutes until easily pieced with a fork and brown and caramelized around the edges. Cooking time may vary if you're using larger sweet potatoes.
Add the chickpeas, olive oil and spices to a mixing bowl. Season with salt and pepper and mix. Spread in a single layer on another baking sheet. Roast in the oven for 20-25 minutes until golden brown.
In a medium bowl, mix the tomato, parsley, red onion, lemon zest, oil, garlic and salt and pepper. Set aside.
In a small mixing bowl or sealable jar, add the tahini, 1/4 cup water, garlic, lemon, paprika, chili flakes and a pinch of salt and pepper. Mix or shake until smooth. Slowly add more water 1-2 tbsp at a time until you reach your desired thickness.
Once the sweet potatoes are cooked, remove from the oven and flip over. Use a fork to fluff the inside of the sweet potatoes.
Serve sweet potatoes on a plate topped with chickpeas and marinated tomatoes. Drizzle with the tahini salad dressing and any other toppings you might enjoy such as green onions, hot sauce or avocado.