Preheat your oven to 400°F (200°C).
Toss the butternut squash cubes with 1 tablespoon olive oil, salt, and pepper. Spread them out on a baking sheet and roast for 25-30 minutes, or until tender and slightly caramelized.
While the squash is roasting, cook the quinoa. In a saucepan, combine 1 cup of quinoa with 2 cups of water. Bring to a boil, then reduce the heat to low, cover, and simmer for about 15 minutes, or until the water is absorbed and the quinoa is fluffy.
In a large mixing bowl, combine the cooked quinoa, roasted butternut squash, cherry tomatoes, red onion, and parsley.
Drizzle with the remaining 1 tablespoon of olive oil and the lemon juice. Toss to combine.
Serve warm or at room temperature.