I use fresh and saute them. I use a 9x12 pan usually because I like plenty of crunchies on top. You can assemble it the day before I did that once and it still turned out great.
These are really great peanut butter cookies. Few vegan peanut butter cookie recipes are good let alone great. This is fabulous and is replacing my previous vegan peanut butter cookie recipe.
Traditional Green Bean Casserole