Preheat oven to 425 degrees Fahrenheit and prep a sheet pan with parchment paper for easy clean up. Toss chopped sweet potatoes with 1 tablespoon of olive oil and salt and pepper to your taste, then spread out on the baking sheet evenly so no pieces are overlapping. Bake the sweet potatoes for 20 minutes, then flip/toss the potatoes so they'll brown evenly.
Meanwhile, prep the broccoli by mixing with olive oil, salt and pepper. If there's enough room, after the first 20 minutes, place the broccoli on the pan with the sweet potatoes or place on a separate sheet pan. Roast another 15-20 minutes until sweet potatoes and broccoli are crisp on edges.
While the potatoes and broccoli roast, prep the tahini sauce by combining all the ingredients in a small food processor or by whisking together in a bowl. Add 2-3 tablespoons of cold water until desired consistency is reached. Taste and adjust any seasonings - some tahini are more salty than others. I add about 1/2 teaspoon of kosher salt.
Chop any extra veggies you plan to add like pepper, green onion, etc. Microwave or cook rice/grains as well. Then begin to build the bowl with 1/2 cup cooked rice, sweet potatoes, and broccoli on the bottom. Top with tahini sauce, green onion, and toasted sesame seeds.
Notes
The base of this needs to be sweet potatoes, but other vegetables can be subbed out. I do like to use broccoli, but the red bell pepper or green onions can be subbed with shallots, chives, mushrooms - any vegetables you like or have on hand.