As a person with gluten free family members:
1. Clean the area you will be using.
2. Make the gluten-free food
3. Cover it
4. Make the other food.
5. It’s also okay to have a few gf/vegetarian sides to share (mashed potatoes from scratch and steamed green beans are two good ones) and a sealed freezer meal that the gf person can prepare themselves. Just let the guests know ahead of time what you’re able to do.
Thanks.