Bow-ties with Peas and Ham

*kids love this and it's so pretty with the pink, green, and white colors (great for a shower!)*

1 lb box farfalle or bow-tie pasta
3 tbsp butter
1 diced onion
2 cups (10 ounces) frozen peas
1 cup half and half
1/2 lb cooked ham cut in strips or squares (you can use luncheon meat)
Parmesan for grating
salt and pepper

Boil pasta till al dente. Drain pasta and return to pot. Heat butter in saucepan over med heat, add onion and cook until soft, 3-4 minutes. Add frozen peas and half and half. Season with salt and pepper. Simmer until thickened, 3-4 minutes. Add ham to sauce, cook until heated through. Toss sauce with pasta, serve with grated Parmesan.