Bring a large saucepan of salted water to a boil, add pasta then cook until al dente. Drain pasta and set aside.
In a large frying pan, melt butter over medium heat. Add most of the garlic, keeping some for later. Coat the garlic completely with butter but don't let it brown. Add prawns and toss to coat. Immediately remove frying pan from heat; prawns will not be cooked yet.
Sprinkle the prawns with enough breadcrumbs to coat then transfer the entire mixture to a medium casserole dish. Pour wine and the lemon juice over the prawns. Cover and bake at 180 degrees for 10 minutes. Remove cover then bake an additional 5 minutes.
In a small saucepan heat olive oil with remaining garlic. Toss the pasta with the olive oil and garlic mixture. Serve the prawns over the pasta with additional lemon slices on the side.