Preheat oven to 375°F. Add cheese, asparagus, cherry tomatoes, and white beans to a baking dish, keeping ingredients mostly separate. Drizzle with olive oil and season with salt and pepper.
Bake for 30 minutes, until vegetables are tender, cheese is softened and tomatoes are bursting.
While the dish bakes, cook pasta according to package instructions. Add peas during the last minute of cooking, then drain.
Remove the baking dish from the oven. Set aside the asparagus and white beans. Mash the roasted tomatoes and Boursin together to create a creamy base. Stir in broth, lemon juice, and lemon zest until smooth.
Add pasta and peas to the sauce, then fold in the asparagus and white beans. Mix until everything is well coated and creamy.
Serve warm with extra lemon zest or black pepper if desired.