I really think JessinTexas is onto something....
How much protein does your husband eat at his meals? When I was trying to lose postpartum baby weight, my husband and I did a low-carb plan. It was about the time Atkins was getting popular, but it wasn't Atkins, it was called Protein Power.
Here is the thing: eating carbs makes you want more carbs (food). Carbs are processed by the body into sugars--easily usable energy. It stimulates your body to produce insulin, which triggers a whole lot of stuff (it is a hormone and doesn't just manage your blood sugar--it does other stuff too).
BUT, eating protein (without many carbs) does NOT trigger the insulin response. Also, protein is more filling, without making you feel bloated or stuffed. And men need more of it than women do. The amount of protein you need is determined by the amount of lean muscle mass you have. So men almost always need more than women.
Some for examples:
I could go out to dinner (when I was restricting carbs and eating adequate protein) and eat an 8 oz steak (approx 50 grams of protein), a side of green beans or mushrooms or a salad. And feel satisfied but not "stuffed". When I was eating carbs (say, boxed cereal for breakfast and a sandwich and chips for lunch) then we'd go out. They'd serve the bread while you wait for the steaks. A slice of bread. Then the steak--well MOST of it, but not all-- and a potato or rice or whatever. I would feel like I needed to unzip my pants almost. And then as soon as I was no longer feeling "stuffed" I wanted to munch on something.
For me, I need about 50-60 grams of protein a day (15-20 grams per meal 3x a day). IF I eat that much protein, I CAN't eat junk. I am full. If I eat a breakfast with no protein (or less than 7-10 grams at a minimum) then I can eat ALL DAY LONG.
My husband, however, needs closer to 25-30 grams per meal (average 3x a day)... if he doesn't eat 75-90 grams of protein--he is hungry. And he normally does. He has Kashi cereal for breakfast, and sometimes a protein smoothie/shake. He has a lean meat sandwich at lunch, and greek yogurt. He snacks on nuts. And he will get up from the dinner table and go straight to the fridge to "look" if he doesn't eat at least 7 oz of some kind of protein at dinner.
Now. Your husband is not going to willingly stop eating bread and pasta, chips and crackers and desserts, etc. BUT, you can maybe change some things without him noticing so much, and just see what happens.
Serve lean chicken (fried even if you want, or grilled or baked--but no breading or sauce/gravy, not in a casserole loaded with carbs), and green veggies. Add a garden salad with ranch dressing (full fat dressings have fewer carbs) and lots of variety in it(red bell pepper, radish, carrots, black olives, cucumber, tomato, onion) and sprinkle it with pumpkin seeds or sunflower nuts or chopped walnuts.
Serve fresh strawberries with whipped cream for dessert. (seriously---its low carb).
Then... see how much he gets up to go munch afterwards.... I'll bet he doesn't.
You can do this with lots of meals... and he won't even notice if you do it right. Make sandwiches out of "light" bread (it has a LOT fewer carbs than any of the regular breads--the heavier the bread, the more carbs).