Add butter to a medium saucepan. Place over medium heat and melt butter.
Add pancetta. Cook, stirring constantly, until lightly browned, about 5 minutes.
Add onion. Cook, stirring occasionally, until golden brown, about 5 more minutes.
Increase heat to high.
Add wine. Bring to a boil, scraping up any browned bits in saucepan with a wooden spoon.
Add stock, bring it back to a boil. Cook until reduced by 1/2, about 15 minutes.
Add cream, bring back to a boil. Cook until lightly thickened, about 5 minutes.
Add Fontana, goat and Romano cheeses. Stir until melted.
Season with salt and red pepper flakes, to taste.
Fold in pasta and reserved lobster meat. Mix gently but well. Cook just until heated, about 1 minute.
Divide among 4 serving bowls. Sprinkle each with 2 tablespoons of breadcrumbs.
Serve hot.