Rinse the quinoa under cold water and place it in a small pot with 0.5 cup of water.
Bring the quinoa to a boil, then reduce heat to low, cover, and simmer for 15 minutes or until water is absorbed.
Season the chicken breast evenly on both sides with half of the sea salt, black pepper, and dried oregano.
Heat 1 teaspoon of olive oil in a skillet over medium-high heat and sear the chicken for 6 to 7 minutes per side until cooked through and golden brown.
While the chicken cooks, whisk together the remaining 1 teaspoon of olive oil, lemon juice, minced garlic, and the remaining herbs and spices in a small bowl.
Dice the cucumber and halve the cherry tomatoes.
Once the chicken is done, let it rest for 3 minutes before slicing it into strips.
Assemble the bowl by placing the cooked quinoa on a bed of baby spinach.
Top with the diced cucumber, cherry tomatoes, and sliced chicken.
Drizzle the lemon-herb dressing over the entire bowl and enjoy immediately.