Our grocery store just had a meat sale and we stocked up on poin loin. Got two huge ones for less than $3 each!!!! Amazing. One will feed the two of us for 5 meals. The bf has a great recipe and he grills the loin. Grilling is the best way I've eaten a pork loin.
We also do chicken or beef "tacos." Cook up the meat, add beans, cheese, olives, whatever, and put in a toasted low carb pita.
Last night we had beef jerky for dinner.

Weird. But it was surprisingly filling (I got lower sodium jerky). I intended on getting some and snacking on them while I cooked dinner, but we were both so full afterwards we skipped dinner.
Since your short on time I would also recommend lean cuisines.