Costco sells a big bag of stir fry veggies, good quality with about 10 different veggies. A quick stir fry with some garlic, soy sauce or if you have a jar of Thai curry paste and some coconut milk, you have an instant veggie curry or stir fry. The veggies cook in about 5 mins. All the ingredients are non perishable for the most part or can be frozen for long periods so this is a good standby pantry meal.
A pasta bake is good too, I use rice pasta or quinoa pasta as I can't do wheat. Fry up some peppers, onions or whatever you have on hand, add bacon or ham or chicken or ground beef if you have them. Mix with cooked pasta and add tomato/pasta sauce. Throw in canned olives, artichokes etc. If you don't have any thing resembling tomato sauce, add a bit of olive oil. Top with grated cheese and bake until cheese browns. I've also done a quick stove top version with spaghetti or pasta: stir fry some garlic, mushrooms if you have them are good too. Stir into pasta and add some lemon juice. Add spinach if you have any. Serve with cheese, preferably Parmesan on top.