lassagna
spaghetti
whole roasted chicken with potatoes and carrots, and even better, the homemade soup stock we make from boiling all the leftovers together the next day
grilled ham and cheese sandwiches with salad or soup
breakfast for dinner (either pancakes and sausage, or egg "mcmuffins" with ham or bacon)
We live in a suburb of a big city and have pretty much anything we want readily available to us, so we often do the "meal deals" from local mom and pop places, or have our grocery store grill us some burgers, chicken, fish, or whatever else we want, or have take-out delivered. $1.00 Taco Tuesdays are awesome - we have this tiny little place in our town that makes Mayan Mexican food and they sell a PBJ taco that is out of this world!
We use Costco a lot too....my kids love their trays of mac and cheese, ravioli lassagna, and I'd honestly rather pay $4.99 for their ready-made rotisserie chicken than make my own. it's cheaper and easier!