Heat the olive oil in a skillet over medium heat. Add the pearl couscous and toast for 2 to 3 minutes, stirring frequently, until lightly golden and nutty smelling.
Pour in the broth and bring to a boil. Reduce heat to low and simmer for about 10 minutes until all the liquid is absorbed. Remove from heat, stir in the lemon zest and lemon juice, and let cool to room temperature.
While the couscous cooks, cook the diced squash in a skillet with a drizzle of olive oil over medium-high heat until tender and slightly golden. Set aside and let cool to room temperature.
Whisk together the olive oil, lemon juice, honey, salt, and pepper until emulsified.
In a large bowl, combine the cooled couscous, cooled squash, cucumber, cherry tomatoes, red onion, parsley, and feta. Pour the dressing over everything and toss gently until evenly coated. Season with salt and pepper to taste.
Serve at room temperature or refrigerate and pull out 20 minutes before serving.