I do a bit lower fat plan, so for breakfast I eat cold boiled shrimp and chicken, and smoked salmon or trout. I made a couple of batches of turkey chili (no beans) and ate that for breakfasts - well the cowboys did it, lol.
I poach chicken breasts and freeze them 2 to a ziploc, defrost when needed and shred the meat. You can boil water in large pot, add chicken, cover and turn off heat, allow to sit for 25-30 min and remove, pack and freeze. I like them plain,but you can add vegs and salt/pepper to the water if desired.
I also cook and freeze brown rice in small packages.
Bob's Red mill makes some quick cooking cereals that are whole grain.
I also make mashed potatoes with just chicken stock and measure out 1/4 cups, flatten and bake in the oven, at 375 for 45 mins. Cool and freeze, another very quick 'bread' like addition to a meal.

You will make new discoveries as you go and keep checking the recipes -

Ali