Preheat the oven to 500F or 450F convection. Line two baking sheets with parchment paper.
To cook the rice: add 1 cup rice to a fine mesh strainer and rinse, using your hands to agitate the grains, until the water runs clear. This gets rid of the extra starch so your rice isn’t mushy. Add rice to a medium pot along with 1 ½ cups water. Cover and turn the heat on high. Once the water starts to simmer rapidly, reduce the heat to low and simmer gently, covered, for about 12-15 minutes, or until the water is evaporated and rice is cooked. Don’t remove the lid until the timer goes off!
In a medium bowl or large tupperware container, add the cucumbers, vinegar, and soy sauce and toss to coat. Set aside.
In a small bowl, whisk together the yogurt, sriracha, honey, sesame, ginger or garlic, and 1 teaspoon salt. Transfer ½ cup of the mixture to a separate small bowl to use later for the sauce.
Add the salmon to the medium bowl and toss to coat. Scatter the salmon chunks onto the baking sheet, spreading them out evenly. Add broccoli to the other baking sheet and toss with the 1 tablespoon olive oil and remaining ½ teaspoon salt. Spread out into an even layer. Bake for 10 minutes, or until the salmon is cooked through and is beginning to brown a little bit (the sauce on the baking sheet will burn, that’s fine!).
In the small bowl with the reserved marinade, mix in the 1 tablespoon rice vinegar and 1 tablespoon soy sauce.
Add warm rice to your bowls along with the cucumbers, broccoli, and salmon. Drizzle the reserved sauce all over and top with nori (if using), herbs, and sesame seeds.