Cook the pasta according to the instructions. Drain the water. Add oil, vegetables, and seasoning to the pot. Continue heating until vegetables are cooked how you want them. You might start with olive oil, mushrooms, squash, and garlic.
Boil the noodles with salt. Throw a noodle up onto the ceiling, and if it sticks they are done. Next get a pan, olive oil, fried tomato, eggplant, basil, and garlic. Throw on some fresh grated Parmesan and your set.
Mixing any kind of cream soup like cream of mushroom and then adding peas and carrots is really good.
One of my favorites is: Boil spaghetti, fry some stir fry veggies. Then heat a little sesame oil in a pan, once hot add spaghetti and veggie. Add some soy sauce to make it brown. You can even put chicken in it to make it like chicken low mein. It is really good. I actually put a lot of sesame oil, but you do not have to.
One of my fave quick and easy pasta recipes is to defrost frozen spinach (don't drain it) and stir it into cooked pasta with some wedges of Laughing Cow cheese. Reheat and stir until all is well blended. This makes a low calorie, low fat, mock Pasta Alfredo.