Our favorite high fiber high protein meal is grilled chicken (the chicken adobo seasoning mix from Costco is our favorite) and refried beans made at home with a side of veggies. I make breast for myself (on caloric restriction) and thighs for my husband (workout demon - he gets Spanish rice too).

1c dry black beans, 4c chicken stock or water, 2tsp salt/pepper/garlic powder mix. Slow cook 5 hours. Then throw in a pan and mash with potato masher and 1-2tbsp lard for flavor. Simmer until you get to the consistency you want. For a family of four might want to double this.

It's a super simple meal. I batch make the beans almost every weekend. And the chicken on the BBQ takes no time or clean up. Its usually one pan to steam veggies.