ANYTHING in the crock pot, I feel that monster FULL... I think it's a five or six quart one and cooks up a mammoth of a meal. I am huge on crock pot soups. They never seem to end lol When the broth gets low I use more water and keep cooking it... they never seem to end - really! Chili goes a long ways too, craving that today as well.
Baked casseroles are another meal stretcher over here. I use huge lasgna pans and it yields multiple servings. Sometimes I can barely lift the pan lol
I've also found stretching ground meat can really help with multiple meals. I like adding veggies... onion... sometimes oats --- and then you can divide it up into batches for various meals.
Nice suggestions above, especially hard boiled eggs. I prefer to cook them in bulk as well.
"Give a man a fish and you feed him for a day. Teach a man to fish and you feed him for a lifetime." ~Chinese Proverb~