We eat together most nights - maybe one night a week where we eat separately.
Try and think of meals in terms of the main carb and rotate them, ie pasta one night rice the next potatoes the next, bread the next.
I find that way it is easier to think of things to cook.
Pasta can be with tomato sauce, spag bog, macaroni cheese, lasagne, pesto etc.
Rice can be meatballs, chilli, curry, risoto, goulash etc
potatoes can be with stew, or ham, or fish pie, or roast chicken, or baked
Bread can be dippy egg, beans on toast, scrabled egg, toasted sandwiches etc
Added to that we have pie (which I don't normally do spuds with) or toad in the hole (ditto)