gnomi | Recommendations for Recipes Sought

So, for Shabbat dinner, we're hosting a bunch of folks, and I've started doing the cooking because there are a lot of things to be made from scratch. However, I think I may have slightly overbought a couple of ingredients that won't last forever (in other words, produce). The things I know I have that are extra are celery (can't just buy the three or four stalks I need for the recipes, alas) and green pepper (I didn't know until I'd chopped all of it that I probably have about 1/2 c. too much).

I also have extra can (14.5 oz) of diced tomatoes and a bunch of other random ingredients in my pantry.

So, I turn to you lovely folks. Can anyone suggest a recipe that incorporates the above ingredients (not necessarily the diced tomatoes, but for sure the perishables) and that isn't overly time consuming to make?

Thanks in advance.