Green beans, especially with a small batch, is easy! =) Snap off the ends, and then snap the beans into bite sizes. Clean them (just rinse thoroughly in water a couple times) and put them into a pan. Add whatever you'd like (bacon, salt, and pepper, or we do onion or onion powder and a boullion cube a lot) and cook slow for 3 hours or so. Give it time to absord the flavor from the things you've added.
Our green peppers actually aren't very good for just eating (I don't know if it's the variety or what this year), but they're great for cutting up and adding them to omlets, or adding green peppers & onions to your burger.
Zucchini - so much to do! Zucchini bread, zucchini pie (like a cream pie), you can put it in cake or brownies as the shortening (much like you would substitute apple sauce), you can slice it and steam it with seasonings on top, you can slice it and cook it on the grill, too (directly on the grill or in aluminum foil).
I hope that helps! Great job for having a garden. We love ours!