Chickpeas with Swiss Chard

We made this fairly quick-and-easy dish last night, adapted from this recipe, and it was lovely, both taste-wise and looks-wise.

Ingredients
Olive oil
1 large yellow onion, halved and thinly sliced
2 cloves garlic
1 chili pepper, minced
2 cups cooked chickpeas
2 plum tomatoes, diced
A little vegetable broth
1 bunch red Swiss chard, stemmed & coarsely chopped
1-2 pinches lemon zest (preferably Meyer)
A squeeze of lemon juice
Ñora pepper, salt, & freshly ground black pepper

Saute onion in a generous glug of olive oil over medium-high heat until it starts to brown, turning the heat down a bit if necessary. Add garlic and chili pepper, stir for 10-20 seconds, then add tomatoes and saute for a minute. Add the chickpeas and continue to cook, stirring occasionally, for another 4-5 minutes, adding a little veggie broth if necessary to keep it moist (there should be a little liquid -- not too much -- in the bottom of the pan). Next, add the swiss chard, a pinch of salt, and a little veggie broth, and cover the pan to let the chard wilt a bit in the steam. Uncover, and continue to cook for a couple more minutes. Add the ñora pepper, black pepper, lemon zest, and lemon juice, turn off the heat, and serve.

Serves 2 (with something else, if you're making it for dinner).