The only thing that has worked for me, stall-wise, is cutting back on calories. I've been experimenting with seriously cutting calories back for a few days (3 or 4) a couple of times a month. The rest of the month I eat normal lowcarb. So far, I have lost a couple of pounds each time I have done this. At this point, I could not lose weight eating the quantity of food you describe above. If you want more details, I've been chronicling it in my journal starting in late February.