When you're busy and pressed for time, I find pasta really easy and quick to make. In the time that it takes to boil the water and cook the pasta, you can make a great sauce to go with it.
My latest favorite is pasta with some steamed broccoli and edamame and walnuts. I mix it together, throw it in an overproof casserole and top it off with some good cheddar cheese. Broil for a minute or two to melt the cheese.
I'm also a big fan of my spinach pasta dish - it's the only way (aside from sneaking them in smoothies) I can get a 1 and a 3 year old to eat leafy greens. Saute garlic in 2 tbs olive oil or butter, add 2 tbs flour, cook for a bit, then slowly stir in 2 cups milk. When sauce has thickened, add chopped spinach (I usually throw fresh in the food processor, but I have used frozen chopped spinach before too), and some grated parmesan. Add salt and pepper to taste, and mix in pasta.
You could saute some veggies and add them to a regular tomato sauce.
Breakfast for dinner is also fun. Pancakes, waffles, or eggs, with some fruit. Peanut butter and banana sandwiches are easy too.