Combine beef,rice mix (reserving seasoning packet), egg & onions.
Divide and stuff meat mixture into pepper halves.
Pour tomatoes into slow cooker, arrange pepper halves on top.
Combine tomato soup, rice-mix seasoning packet & water, then pour over peppers.
Cover, and cook on low 8-10 hours in crock pot.
Twenty minutes before the end of cooking tim, top stuffed peppers with cheese.
