Sirloin
White fish (unbreaded)
Salmon
Canned or packet tuna. Just eat it straight.
Grilled chicken
Lots you can do with cans of chicken breast from Costco. I like to shred it and add some taco spice. You can still eat it plan but also good for grilled quesadilla.
And have a Greek yogurt every day.
And of course lots of protein bars.