I definitely know how you feel! My husband sounds very similar--meat & potatoes, not the most adventurous eater, won't eat seafood, etc. Does your husband like chicken? One thing that we do a lot of is grilling--especially when summer rolls around. I'll buy those boneless, skinless chicken breasts for my husband to grill (gotta love "manly" cooking), and on the side I'll have salad (I use that term loosely--usually just iceberg or romaine lettuce with peppers, one of the few veggies my husband eats, and dressing) and one of those boxed flavored rices. I'll have him make extra chicken, and then I'll use the leftovers in chicken enchiladas the next day. The enchiladas are far easier than one would think. Mix the chicken with about 4 oz of cream cheese, a can of diced green chilis, and a splash of milk. Stir till creamy. Put 2 tablespoons or so along the edge of flour tortillas, roll the tortillas, and put them in a 9x13 baking dish. Pour a can or two of enchilada sauce over the top, sprinkle some mexican blend cheese, and bake at 350 for about 30 minutes.
Another handy idea is lasagna--make the sauce the same as with spaghetti, and then layer it with cheeses and no-boil lasagna noodles in a baking dish. Since it's just me and my husband, I usually use a square baking pan; it's enough food for the two of us, and it takes less time to bake.
Sometimes instead of tacos we'll do nachos. Make the meat exactly like you would for tacos. Spread tortilla chips on a baking stone, top with meat, green chilis, and cheese, and bake at about 350 for 10 minutes or so. Serve with salsa and sour cream.
Is he into Chinese? I'm still working on more Asian-style foods with my non-foodie hubby, but you can always buy those pre-cut veggie mixes and stir-fry them up with slices of beef or chicken. Serve over rice and voila!
I hope some of this helps! I have some other ideas too, but this post is already a little long. :-)