Take some time to go through the FAQ's, food lists and recipes here. You'll see that you can do a pretty clean phase 1 if you just stick to lean meats and vegetables. My family didn't need or want to diet the first time I did SBD and I was able to stay on plan while fixing regular meals for them. Now is a great time for you to start because I'm assuming you're on winter break and would be able to do some of the cooking for your mom. If she's like me, she'll be glad to pick up the foods you want to fix if you'll be preparing the family's meals.
You can grill or broil chicken or lean meat and serve it with steamed or roasted vegetables. I used to microwave potatoes for my DH and teens, too, or fix them rolls to go with their meals. A couple of phase 1 recipes that my family really liked/likes are white chili
, deep dish Italian pie
, taco bake
, and crack slaw
. Regular chili with ground beef, too. Most of these don't take much longer than frozen entrees or boxed meals and they taste better and often cost less per serving. Maybe you could be the catalyst that helps your mom find foods to fix that will be better for her health.
I don't care for eggs so my phase 1 breakfasts are usually leftovers from lunch or supper the day before, or cottage cheese with vegetables or v8.
My favorite phase 1 snacks are red pepper strips, cheese sticks, pistachios or almonds and veggie strips and hummus.
A quick and easy sweet snack is the Peanut Butter Cookies
. They get mixed reviews, people either love them or hate them but we like them. (I do the 1 egg, 1 cup Splenda and slightly less than 1 cup PB version - maybe 3/4 cup? I eyeball it. I make them small, using an iced tea spoon to scoop them, and bake for 11 mins @ 350. That gives the cookies more of a meringue, less greasy texture.) The nice thing about these is that you probably have everything you need in your cabinet right now.
You also asked for hints/tips - mine is a no-brainer to a lot of people but I was also one who skipped breakfast and often skipped lunch, too because I teach kindergarten and don't have much time at noon. When I plan and eat 3 balanced meals/day I have so much more self-control and self-discipline. I feel full and comfortable and the chips and salsa or M&Ms my husband snacks on are easy to skip.
Good luck to you!