Acorn squash You can start a day or two beforehand on the dishes that will complete your holiday menu: Slice squash up to a day ahead; refrigerate in a resealable plastic bag. Once cooked, squash can sit at room temperature, covered, for up to two hours.
Spinach-and-Cheese Puff (Martha Stewart). This spinach and Gruyere cheese puff has a light, souffle-like texture but unlike a souffle, it can be make ahead of time. In place of the Gruyere, feel free to use cheddar or smoked Gouda cheese.
Italian Purse Appetizer sheet puff pastry, defrosted 9 teaspoons store bought pesto 9 tablespoons roasted red pepper, chopped 9 tablespoons cheese, shredded ( I used Havarti) 1 egg 1 tablespoon cold water salt and pepper to taste.