I don't know what kind of things you have in your kitchen, but here are some ideas...
salad: keep it simple to maximize calories for the dinner. Also, if you can eat more salad and eat a smaller portion of the entree, you can make something a little more decadent. Try mixed greens or spinach with veggies (red onions, peppers, cucumber - whatever you like), maybe some fruit (I like pear and apple, some people like oranges or berries), you could add a bit of reduced fat feta. Salad dressing is really easy to make - just lemon juice or vinegar, a bit of dijon mustard, garlic, olive oil, salt and pepper.
I also like roasted vegetables as a side for dinner, like aspargus or broccoli, but you could also make peas. Sautee some garlic and onion in a bit of oil and add frozen peas and some salt and pepper. You could also add a bit of mint.
Salmon is really easy to make. Lemon zest and juice, dill, dijon mustard and bake. If you wanted to spend a few extra calories - you could use maple syrup and a little soy. Or some ginger. There are a TON of easy salmon recipes online! So good...
I like roasted squash risotto. It does take a while though - risotto is kind of intensive from scratch. Maybe some nice brown rice?
Alternatively, you could make a pasta with salmon and vegetables? Whole wheat pasta, some sauteed veggies, a little oil and garlic and some roasted salmon? The key to cooking is to think about things you like or that you've eaten before and build from it.
For dessert, maybe try baked apples? Cut up some apples, throw them in a dish with some splenda and cinnamon and lemon juice, top with some oats mixed with a little more splenda/cinnamon, spray with cooking spray, put in oven. Serve with non fat vanilla yogurt.
Your guy will love that you put the work in, so don't stress too much about the menu. I've discovered that my partner in crime loves just about everything I make.
And there are TONS of easy, healthy recipes out there. Just relax and find one that appeals to you!