Sorry, just saw your post and realized it is too late to help. I'll post anyway in case it helps in the future! I got stuck once like that due to my poor aging memory, so bought a huge watermelon. Chopped it into triangles about 4 inches long on the rind and arranged in a large dish. Another easy dish is grab a bag of spinach leaves, pour into bowl, add drained mandarin oranges, craisins, crumbled feta cheese, and toasted sliced almonds. Bring a bottle of either strawberry or raspberry vinaigrette to pour over the top. Toss salad after adding dressing and once you get to the party, to keep spinach from wilting. You can also add sliced strawberries for extra summer color. Another super easy is to just get 3 cans of baked beans and put in nice casserole dish, heat and bring. My mom always doctored hers up with brown sugar, mustard and onions, and who knows what else. Maybe they did not have all the flavored varieties when I was growing up? I like the ones that already have brown sugar added and don't do anything but heat.