For your sweet & sour chicken, have you already started it? Or can you look around for a healthier recipe version of it that doesn't call for frying? I must say, I've never heard of egg in a marinade, that sounds kind of gross if you're not going to fry it. I've never made sweet & sour chicken because it's not my thing, but I did a quick search and found a few sweet & sour chicken recipes that don't involve frying:
www.skinnykitchen.com/recipes/super-skinny
-sweet-and-sour-chicken/ www.myrecipes.com/recipe/sweet-sour-chicke
n-10000001599631/ I HAVE made a healthier version of General Tso's chicken, so maybe you can take that cooking method and apply it to your sweet & sour:
traceysculinaryadventures.blogspot.com/201
2/03/lighter-general-tsos-chicken.html
#.UWwbC7WsiSo I got 325 calories per serving when I made it (had it making 4 servings), not counting the rice.
If you don't want to do that, then maybe post the original recipe that you want to use so we can look at it and make recommendations. Hard to say what will work without knowing what the recipe is.
For your ground beef, you can do the same recipes you would do with a pound, just cut everything in half. The first thing that came to mind was to make tacos with it. You can use half of one of those seasoning packets, or make your own to keep the sodium in check. Top with pice de gallo salsa and lettuce, and use corn tortillas. Could do taco salad too. Grilled hamburgers are good too... if you want a bun use one of those sandwich thins to keep the calories in check.
I think a dijon mustard based vinaigrette would be good on a salad with your parmesan chicken.
herbivoracious.com/2009/05/lemon-mustard-v
inaigrette-the-simplest-and-best-salad
-dressing-recipe.html