Certified GKH Gardening Expert
Yes, this is fine. Grass clippings make a good mulch for all veggies. However, stay away from using fresh grass clippings, as they provide a great deal of heat and can burn the plants.
I'm sure you can. Grass clippings are rich in nutrients. Just make sure it is only clippings and no rooted grass. Mix them in really well with your soil if you are planning on adding them.