Try this one; Vegetarian Cottage Pie
Do exactly as you would do with any other cottage pie (ie boil potatoes and mash them) but replace the meat with red lentils. My wife tends to soak lentils overnight, but I admit to just using canned lentils, then augment with carrots and sliced onions. Heat and place in a Pyrex-type dish. Spread the mashed potatoes over the lentils and carrot mix, then cover (according to taste) with grated cheese. Put the whole lot under a grill (to brown the cheese), and bobs your uncle! Usually serve with a bit of green salad, but that's not essential.
If you need to wean your husband away from meat, I admit that sometimes when I am on my own I use the big can of Lentilles & Saucisson (800g) from Lidl), and then I have a meal for two clear days, even with my relatively healthy appetite. I invariably plus up the vegetables - carrots etc. though just the same. NB this meal costs less than €2 - not bad for two days, and very tasty and acceptable.
One of my simplest favorites is Cauliflower au gratin, which I find is a meal in itself and dead simple even for me to make (I don't do the sauce she uses, just again grate cheese over the steamed cauliflower and under the grill!)
Winter dishes do tend to be thick vegetable soups according to season. A dash of Marmite or Vegemite gives these a bit of a zip I find,or a cube of stock, but always good, and varied because of availability.
She also does stuffed aubergines, cold soups from courgettes with mint and a host of other things.
In the Summer yes, loads of salads mostly with fish, and the Lidl salmon strips are very good for this when grilled, but cans of tuna and sardines are also ideal. A good (not mayonnaise as it kills the other flavours) dressing does make all the difference here, but salads are only limited by your imagination, but apart from the obvious lettuce, sliced but not cooked onions can surprise and please the palette. Red and Green peppers, corn (canned or off the cob), radishes, cheese cubes (often also used as a meat substitute), Roquet is another favorite of hers, but it is not to my taste, but grows well.
Her growing garden is totally herbs, but with recent addition of tomatoes which came as gifts. So things like chives, basil, even verveine will often be added to dishes.
There are two essential pieces of equipment in her kitchen - the blender and the bread-maker. She does NOT use a microwave but a standard oven at all times as she feels she has more control over the process this way plus no loss of vitamins, so who am I to argue?
I will take out the manuscript and see what other things she has prepared. These are the things I do for myself now when I am on my own, so even your hubby can do them believe me!
She also does simple things like Polenta and Cornburgers etc. the list tends to go on....