Bring a small pot of water to a boil, carefully lower the egg in, and simmer for 6.5 minutes before transferring to an ice bath.
Dice the chicken breast and tofu into bite-sized pieces, then season evenly with sea salt, black pepper, and garlic powder.
Heat olive oil in a large skillet over medium-high heat and sauté the chicken and tofu until they are browned and cooked through.
Toss the trimmed asparagus spears into the skillet with the chicken and sauté for 3 to 4 minutes until they are bright green and tender-crisp.
In a small bowl, whisk together the Greek yogurt and lemon juice with a teaspoon of water to create a smooth, pourable dressing.
Peel the cooled egg and slice it in half, then slice the avocado into thin wedges.
Arrange the cooked quinoa in a bowl and top with the chicken, tofu, asparagus, avocado, and egg, then finish with a drizzle of the yogurt sauce.