First, prepare the spicy tahini dressing: In a small dish, combine the juice of 1/2 a lemon, 1 tablespoon tahini, 1 tablespoon water, 1/4 teaspoon hot sauce, and salt and pepper to taste. Mix it all up with a fork until well combined. Then, assemble your rainbow bowl by combining arugula, avocado, red onion, edamame, shredded carrots, corn, and sesame seeds. Drizzle the prepared spicy tahini dressing over the bowl before serving.