My Mum is a moderate eater (much less given to overeating than me) with pretty healthy habits. She's also a good cook, who particularly enjoys Asian (Chinese and Thai) , Indian and Middle Eastern styles.
For breakfast she eats a little weetbix with milk, muesli, yogurt, fresh fruit, and a few prumes. She used to also have wholewheat toast but I don't know if she still does.
Lunch is often toast with salad and cheese.
While on her own tea (ie dinner/ supper) will often be leftovers or steamed vegies with a tin of tuna or an egg, but she cooks beautifully for visitors and family.
She likes to snack on fruit, nuts and dried fruit and is good at giving herself small (eaking out) amounts of treats (often gifts) like dark chocolate, crystallized ginger and halva.
She is economical and sometimes I give her free reign to use things up when she is at my house and is cooking, and she'll cook up the damaged applies, curry oldish vegies, cook pikelets from sour milk, make bread and butter pudding out of state bread etc.