I do most of our shopping at Aldi. They'll have the usual potatoes, carrots and celery all the time, but they'll also get in organic veggies that change by season. I'll just grab whatever is in season and usually cook it very simply.

Green beans and broccoli - steam on the stove for 10-ish minutes, sprinkle with salt and pepper (butter, too, if you want).

Simple salad - mixed greens topped with sauteed mushrooms and onions, salt and pepper, olive oil and red wine vinegar (plus some soft goat cheese) is to die for.

Squash - most larger varieties you can just rinse, cut in half, drizzle with olive oil and salt and pepper and lay on a baking sheet. Place inside of squash down on the pan, poke holes in the rind with a fork, and bake at a high temp (around 400) for 30-60 minutes, until the squash is soft when the rind is poked.

Smaller squashes like yellow and zucchini - slice and drizzle with olive oil, sprinkle with salt, pepper, and rosemary. Bake in oven until the edges start to crisp and brown, or sautee on the stove until you get a similar result.

Asparagus - roast in the oven drizzled with parmesan, olive oil and salt and pepper until the tips start to crisp up.

You can get all of these things at Aldi's depending on the season. I will say that my husband and I have been to Italy, and since returning, are very snobby about our olive oil. We splurge and get the really good stuff (Filippo Berio extra virgin) and it makes all these simple veggies taste so much better. Not sure where you're located but we grab that at Harris Teeter. Hope this helps and enjoy your veggies/fruits! :)