First of all, congrats on Tango's impending arrival home! Great news!
I guess the short answer would be: consult with your vet. For a longer-winded answer (goodness knows, I'm really good at those), here's what I do, based on consultations with Eliza and Henry's vet:
Pellets and fresh fruit are always good, of course. I also make a "chop" mix. I got this from the vet. (There's a link below that goes into more detail than the handout I got from the vet.) Anyway, the chop mix is nice because you can freeze a portion of it for later. It's basically 40%-50% grains, 10% cooked legumes or beans (which are optional) and 60% veggies.
I've used quinoa, but brown rice, kamut, spelt, farrow, and hulled barley are also listed. (Obvious point, but you want to let whatever grains you're using cool down after cooking them!)
For beans, it's just the usual soak overnight and then cook. I've used garbanzos and red beans, but pink and pinto are also mentioned. Drain 'em and let 'em cool.
For the veggies, which get chopped up in a food processor, I've used kale, broccoli, green beans and red bell peppers (all organic); additional veggies mentioned include cauliflower, snap peas, jicama, radishes, anise, hot peppers, zucchini, yellow squash, bok chou, mustard greens, Swiss chard, collared greens, carrots parsnips, brussels sprouts, and so on. Avoid veggies that have a lot of water in them, like cucumber, because the mix comes out too wet.
Anyway, mix all the veggies, grain(s), and beans up, package them, freeze some of it and so on.
I give this mixture to E&H mixed in with the pellets (and add some fresh fruit).
This is pretty much a condensed version of the recipe the vet gave me. There are other fun things you can add to it. Here's link to what appears to be the original source of the "Chop Mix":
Life From Scratch: Chop: all things good for birdie
Oh, for the liquid portion of Tango's diet, Joel recommends sipping tequila. In my house, it's single-malt scotch. So I guess it's just a matter of preference...
Seriously, I hope this helps a little. And please keep us posted on Tango's arrival home!

Derek