01 - Preheat oven to 425°F. Arrange cauliflower florets on a baking sheet, drizzle with olive oil, season with salt and pepper, and toss until evenly coated. Roast for 25-30 minutes, turning halfway through, until golden brown and fork-tender.
02 - While the cauliflower roasts, combine soy sauce, maple syrup, rice vinegar, sesame oil, minced garlic, and grated ginger in a small saucepan. Whisk together and bring to a gentle simmer over medium heat.
03 - In a small bowl, whisk cornstarch with water to create a smooth slurry. Gradually pour the slurry into the simmering sauce while whisking constantly. Cook for 1-2 minutes until the sauce thickens to a glossy glaze, then remove from heat.
04 - Transfer the roasted cauliflower to a large mixing bowl. Pour the warm teriyaki sauce over the florets and toss gently until every piece is thoroughly coated.
05 - Divide the cooked rice evenly among four bowls. Arrange teriyaki cauliflower, julienned carrots, sliced cucumber, edamame, and avocado over the rice. Finish with a garnish of sliced green onions and sesame seeds.
06 - Serve immediately while the cauliflower is still warm and the vegetables are fresh. Enjoy right away for the best texture and flavor.