Rinse your grain of choice under cold water to remove excess starch, then add it to a saucepan with water or broth. Bring it to a boil, then reduce the heat, cover, and let it simmer until tender and fully absorbed. This usually takes around 15 minutes depending on which grain you choose.
While the grain cooks, pat your salmon fillets completely dry and rub them with olive oil, garlic powder, smoked paprika, salt, and pepper. Heat a skillet over medium-high heat and sear the salmon for about 4 minutes per side. You're looking for a golden crust outside and a tender, flaky center inside.
In a small bowl, combine olive oil, fresh lemon juice, minced garlic, salt, and pepper. Whisk everything together until it looks slightly thickened and well combined. This dressing is what ties the whole bowl together, so don't rush this step.
While everything else is cooking, chop your cherry tomatoes, cucumber, spinach or arugula, and red onion. Keep the pieces bite-sized so every spoonful gets a good mix of textures. Slice your avocado last so it doesn't brown before you're ready to serve.
Divide the cooked grain between two bowls as your base layer. Arrange the seared salmon, sliced avocado, tomatoes, cucumber, greens, and red onion around the bowl in sections. Drizzle generously with the lemon dressing right before serving.