This was a quick "throw together" meal one night recently, and it worked out great. Sorry, no exact proportions on a lot of things. It's very much an "eyeball" recipe. Use as much or as little of the ingredients as you like.
Pound the chicken breasts with a mallet til they're flattened and uniform thickness.
Marinate for about 1/2 hour in a mixture of oregano, garlic powder, red pepper flakes, salt, pepper, the zest from 2 lemons and the juice from one, and a little rice vinegar.
Grill 2-3 minutes on each side till cooked through.
While marinating, mince a couple of cloves of garlic.
Saute until fragrant in a little olive oil.
Add a bag of fresh spinach and wilt over med-high heat.
When bright green and not quite finished, add a handful of chopped parsely, some dill (to taste, I don't like much dill), and the juice of half a lemon.
Stir together.
Remove from heat, crumble some feta cheese on top and and cover for a few minutes to let the cheese heat up and soften.
Serve with sparkling water and some fresh crusty bread.