Baby Chard with Shallot and Tomato

I usually cook chard with some garlic and olive oil, but somehow we ran out of garlic a few nights ago and didn't notice until after we'd already been to the store. In my apprehensive fridge-raiding to find complementary ingredients that would be flavorful but not too sweet, I threw an assortment of random things into a pan, which somehow became what may actually be my favorite chard recipe yet. (If you don't have access to baby chard, just slice regular chard into ribbons and cook it a few minutes longer.)

Ingredients
Olive oil
1 medium shallot, sliced
1 mild or medium chili pepper, minced
1/2 carton cherry or grape tomatoes, halved
A big, two-handed pile of baby chard
Salt and freshly ground black pepper
Sherry vinegar

Saute the shallot and chili in olive oil over medium heat for a few minutes until soft. Add the tomatoes and saute, stirring, for another minute or two, then add the chard and a pinch of salt. Saute for 1-2 minutes until the chard is just wilted, then turn off the heat and add pepper and a spoonful of sherry vinegar or a little more to taste. Toss to coat evenly, and serve.