Melt butter in a large oven-proof skillet over medium heat. Add diced onion and cook until onion is translucent. Add ham. Cook and stir about 5 minutes.

Add chicken broth and tortellini. Season with salt and pepper. Stir to combine and let mixture come to a boil. Cover with lid, then reduce heat to low. Simmer 15 minutes or until tortellini is tender. Remove lid; stir in peas and cream. Remove from heat and stir in 1/2 cup of the cheese. Sprinkle remaining cheese evenly over the top. Place under broiler until cheese is melted. (Watch closely the entire time so you don't burn it!)

Serve and enjoy!