Originally Posted by Charleysaunt
Not sure how you will make beef wellingtons or kebabs out of leftover cooked meat.
For the wellingtons, trim away what you don't want from the leftover beef & get rid of the fat. Puff pastry and crescent roll dough don't require long cooking/baking time. If you want a thicker higher wellington, I would stack one piece of meat on top of the other - wrap & bake.
For the kebobs - cut the leftover meat in chunks, discard what you don't want. The beef can be reheated separately, or as suggested, the mushrooms, onions, tomatoes, etc are all quick cooking if placed all together on skewers. The kebob ingredients all wind up on the same plate - cooked separately or all together on skewers - on a grill, under the broiler or in the oven.
One of the things I love about cooking, is the creativity based on knowledge, and coming up with my own creation.